The OP is trying to understand peoples subjective opinions - how is that degrading?
By grading their looks. It’s pretty much the meaning of the word. De-grade - downgrade.
One person’s 8 is another person’s 2. It’s so subjective and yet every now and again someone tries to come up with a “but this person MUST be at least an 8”.
And anyway, what is it the OP actually wants grading? The face, the tits, the body, the legs, the arse, the arms, the feet, the pussy, the stamina, the oral, the anal, the handjob, the stroking, the voice, the kissing???? It’s endless and every single aspect is subjective, so stupid, especially to come up with one single grade overall imo..
Taking the OPs three examples, there are some things about all of them I find incredibly attractive but also some things I don’t. But ffs we’re not at a livestock market, despite many punters best attempts to treat women as pieces of meat.