But this isn't necessarily a bad thing. PreP needs to be taken religiously to be effective, or it can lead to increased exposure by people who take it irregularly. So it's mostly only offered to high-risk populations that would have an incentive to take it properly, and afaik, straight white cishet people aren't such a population.
The fact that people don't trust it means nobody's casually taking it or taking for granted that other people are taking it. So it increases awareness of the potential for contracting HIV and underlines the need for protection. At the same time, you can independently choose to take it and provide yourself more protection. So I think it all balances out.