@JeffO, you are correct.
If girls are using HIV Prep(antiretroviral) then that keeps them safe from HIV. However it leaves them vulnerable to other diseases mentioned above.

Guys please just be safe and don't do anything that you would regret later on.
WG's don't ask what diseases punters carry. And let's say they see an average of 5 clients per day. That's 150 clients per month. 2 out of those 150 might have an STD.

If I gave you a box of candy and I told you 1 of those candies might kill you. Would you still eat from the box?