PrEP - 'pre-exposure prophylaxis', taking the anti-HIV drugs
before you come into contact with any HIV infected semen - is indeed going to be what's on offer.
It's one of the classic cases of everyone having their own view of the risks vs the rewards. The risks are supposed to be lower than PEP - 'post-exposure prophylaxis', taking the anti-HIV drugs
after etc - both in terms of effectiveness and side-effects, but if you're not doing anything particularly risky then you may not rate the rewards particularly highly either.
Statistically it is also true that the risk of obtaining HIV from unprotected sex is comparatively low.
Not if you're a man having sex with other men, for example.
If you're a male escort, especially one doing anal, then the balance can look very different: you're more likely to have HIV+ clients for a start. Similarly, you can see it differently if you or a partner are doing IV drugs.