BLucky saidI agree that many gay men don't act responsibly by getting checked regularly. Add to that the rampant promiscuity that many practice and the unsafe sexual practice of not using protection and you have an ongoing epidemic of sexual diseases within the community. It makes it very scary for those of us who think sex should mean something, or at least not be practiced constantly with random strangers.
You are of course entitled to your opinion, but many people, of whatever sexual orientation, like having sex for the sake of having sex. I don't necessarily subscribe to that outlook, but if they are consenting adults, it is their business. There are plenty of people in supposedly stable relationships who screw around.
I think the priority is to encourage everyone to practice safe sex, rather than prescribing who ought to be doing it with whom.