Personally, I don't think that's a sentiment to be proud of or ashamed of. It's a practical reaction to the lay of the land. I hope you don't beat yourself up about it.
The CDC reports that in 2009, MSM accounted for 61% of all new HIV infections and that MSM who had a history of recreational drug injection accounted for an additional 3% of new infections. Among the approximately 784,701 people living with an HIV diagnosis, 396,810 (51%) were MSM. About 48% of MSM living with an HIV diagnosis were white, 30% were black, and 19% were Hispanic or Latino. Although the majority of MSM are white, non-whites accounted for 54% of new infections HIV related MSM infections in 2008.[7] A recent study estimated that for every 100,000 MSM, 692 will be diagnosed with HIV. This makes MSM 60 times more likely to contract the virus than other men and 54 times more likely than women
PREP has the potential to completely turn the tide on HIV infections. I live in a mid-sized midwestern city where between 10 and 25% of gay dudes in my dating pool are HIV+, many of them unknowingly and therefore continuing to spread it. There is a big push from the local public health department to get gay guys at risk of contracting HIV on PREP and it is starting to pay off.
PREP also is helping reduce the stigma of having HIV. Many people who are HIV+ live with a huge mental health burden of dealing with feeling like they are going to be rejected as a romantic partner because of their HIV status. With PREP as an option this helps reduce that burden. I'm not necessarily proud of this but I'm not sure if I would be dating my current boyfriend if PREP were not available because of the risk it could present to my health. He's an amazing guy and having this issue out of the way for us has been very helpful for us.
That's not to say that it doesn't have side effects and that it should be carefully considered but it really needs to be publicized more as a preventative treatment option in high risk populations.