How on earth does this indicate that the girls are not trafficked? Trafficking does not necessarily mean violent coercion.
Trafficked people are often times locked away and isolated from the outside world. Billy's point is that
they are not locked away or isolated, but free to go as they please. Similar to what I've seen, that they go on holidays, go shopping, go out with friends, etc.
The main point that they are not trafficked is that they arrange for their own travel to the UK, and
they are free to return home, and do, whenever they want. In fact, most decided to return home when the pandemic started. And several were contemplating returning after the first lockdown, but then decided to stay home after the second lockdown. Girls that stayed decided to on their own, and were also responsible for their own housing during lockdown. Point is, they were actively contemplating and deciding for themselves to return home, and when they want to return. Also, while here, they choose among the individual locations when and where they will work, and arrange their own travel.
A common method involves promising a girl a job and loaning her the money needed to come to the UK, only for her to find the promised job here no longer exists. No physical coercion is necessary, as she is stuck in the UK with no way of returning home, and no alternative to the solution offered to her. The traffickers have no need to use violence to control her, all they have to do is keep reminding her of the money she owes them, and the impact on her family back home if she fails to keep up repayments. In many cases, if the girl can speak enough english, they don't even need to provide a minder - where is the girl going to run to?
Again, the girls decide for themselves when they will return home.
It can be very difficult to tell if a girl has been trafficked. However, for girls that must have spent a significant sum of money to travel from a very low income part of the world (China, Romania, Brazil, etc.) you really do need to ask how likely is it that she could afford to do that without some "assistance"?
As Malvolio stated, China is not a "low income" country. And especially the SPs, who easily buy their own return flights home, and don't need assistance... without going into details, the short of it is that these girls have plenty of money, to say the least.
I am not saying that every Chinese, Rom and Brazilian has been trafficked, that would be ridiculous.
In your first post you stated that "there is a high probability that the girls in these places are trafficked", which is completely incorrect. And I'm not saying trafficking doesn't exist. However, I have been to many, many places, and have private communication with many, many girls, and just haven't seen it at Chinese places. I have potentially seen trafficking at Romanian places, and I have reported to the authorities, so I'm not oblivious to it, and I'm not insensitive to the plight of girls when it actually occurs. (And this is on record in an old post of mine.) It's likely that places that use trafficking will be structured very differently, and will be rare, and isolated from standard places.
However, the uncomfortable reality is that a number of Chinese "massage parlours" around the country have been raided for trafficking.
Raided for trafficking does not mean that trafficking occurred. In fact, it's remarkable how seldom trafficking is actually found at these raids. And I won't get into it, but some cases of trafficking weren't really trafficking.
I remember a program on TV where there was a Vietnamese girl who had been brought into the UK to work in a nail bar - she was underage.
She kept being transported to different nail bars (bit liek SPs who move around). She was taken into custody by the Police multiple times - but each time she would run off and suddenly end up as an employee at a new nail bar miles away in a new city. She absolutely wouldn't turn on her own - even though it was pretty obvious it was seriously dodgy and criminal.
Likewise, travellers who keep people in servitude for building work. They control their wages and accommodation and make them work 12+ hours a day for les than minimum wage - there have been loads of examples with eastern europeans and even homeless British being victims. These people were also free to work in customers homes and could have run off if they had wanted to - but they often don't.
... I just try and avoid them totally to be safe... Even then a lot of them bait and switch - so even on a basic level - screw them.
Apples and oranges, and nothing at all like Chinese SPs. And that you make this comparison, and that you don't visit these places, and you have no communication with the actual SPs themselves, shows that you are merely speculating.
In contrast, I've spent a lot of time learning about about these SPs, and how their business model operates. And I know quite a few others on here that know as well. Without going into details, the short of it is that the SPs themselves are independent; Chinese SPs decide for themselves where and when they will work. They arrange and pay for their own travel within the country. If they tire of working, they take a holiday. When they are ready to leave the UK, they have plenty of money, and decide for themselves to return home.
They are not trafficked or coerced into working. They do so because it is the fastest way for them to make money, which they put to good use to improve their lives back home.
I could go into many times more details that support this. But I won't.