Really?! You know what every WG you go to gets up to in her spare time?
With her boyfriend/pimp/boyfriend's pal/random met in a club?
Welcome to the ranks of the seriously deluded, fuckface.
There is a chance of contracting disease, like many things in life, from any sexual encounter - no matter how innocent. Punting therefore, like other sexual activities is a numbers game in that regard, with differing levels of acceptable risk.
The reason you'd be far more likely to pick up something from a prostitute is due to her sheer number of sexual partners. But any responsible one will near enough negate this risk by only and always engaging in protected penetrative sex and effective hygiene methods with clients, often making experienced, professional, responsible WGs safer partners with regard to sexual health than the wider population. Of course, they'll have had have had the odd, very likely responsible, bareback sexual experience in their time. But unlikely within that particular timeframe they're working, (not counting Romanians taking a pop off Sergei most nights, whom I avoid for several other reasons also) and with very few partners overall, making the chances of catching something, combined with the use of a condom during each encounter, effectively as low as they can be for sexual activity with any new partner.
However, when you start frequenting fuck-wit, death-wish bints who'll ride any possibly-infected dirty bastard unprotected, who, in turn, clearly enjoys shagging other desperate prostitutes without a rubber, giving even wider, more direct access to the clap and junkie pool, those numbers are no longer on your side.
It's essentially the same as the simple philosophy as to why it's wise not do a civvy girl you've just picked up unprotected, as if she's willing to ride you without a jacket first time-round, how many other desperadoes have shot their clap-ridden muck inside her? Now, multiply those possibilities by hundreds and thousands of partners, over only a short space of time, and you'll see what I'm getting at with regard to bareback prossies. Once you venture into that very explosive minefield, the chance of catching something simply snowballs to and from every direction.
So, when you actually think about it, just for a few moments, you'll realise it's the likes of yourself, not I, who are at the very top of the tree when it comes to foolish delusion, you fucking little cretin.