I think that people should be entitled to spend the rest of their lives with someone who they truly love.
Government sanctioned marriage is not required to do this. Furthermore it is not necessary that the rest of the population provide validation for this; they only need to acknowledge that you can do it if you choose to. Lastly the goal of making this an entitlement is the problem. What we are saying is that we need this action to be legislated by the government for it to have meaning (scary).
Politicians are there just to get to a higher status. They will jump onto anything 'trendy' or popular so they can get more power and have little disregard for their voters.
I think that is only scratching the surface, and there is a much deeper and darker purpose to political & governance system. Some conspiracies are not theories.