I don't think it will make the difference you imagine it will.
Reagan did not address AIDS at all. Following governments have done more, including funding research. I understand that AIDS is no longer a death sentence, and people with AIDS are living decades longer. I had no idea at the time what would be possible, but it turns out that there has been a huge difference, and had Reagan paid attention sooner, probably lives would have been saved.
You don't think that gay marriage is serious marriage?
I don't have a great opinion of marriage for gay or straight people. Any marriage is a serious as the couple can make it, whether they are gay or straight. The biggest obstacle to a permanent marriage is that people change throughout their lives, and much oif the time each member of the couple changes in a way that makes living together quite difficult or even impossible.
I have no idea whether gay married people are more or less faithful or careful with protection against AIDS than straight people. I just think that couple who wishes to marry should have the legal right to do so. I can't imagine what I said that caused you to think that I consider gay marriages "less serious". I have noticed that Rick Scott, aka Governor Skeletor, was once rabidly anti gay marriage and now his ads say nothing about it. His campaign ads accusing Charlie Crist of corruption are so silly and false that he refuses to comment on them.