People who have those feelings and choose not to act on them are making a choice. That establishes that there is a choice to make. You feel how you feel. Your preferences are what they are. Beliefs are what they are also. I am a woman who is not attracted to men but I do believe that marriage is between a man and a woman so I have a choice to be in a relationship with a man (I was married for 20 years and I'm divorced and maybe this was part of the reason but not the only one), or I can be single. The other choice would be to go against my beliefs, and that is not a choice that I will make. What you feel is not really a choice. It is what it is. What you do is a choice.

I think that the only viable solution will be to separate religion and legal status. I feel strongly that marriage is a religious thing and people need to be free to follow what they believe God has intended marriage to be. But there should be a legal way to designate someone as part of your family or next of kin or dependent that includes all of the rights so that the person you want can make decisions as you designate, and so that everyone has the same access to health benefits, tax status, etc. There is no excuse for anyone to treat anyone else badly or to try to force another person to change who they are.