There are lost of needy people and lots of demands on our tax dollars. I am sorry but being gay just doesn't make the list for me. A lot of what you listed doesn't apply to me as a married person. Much of it I could live without. The ONLY one that has any real weight, imo, is SS benefits, but you have that on an individual basis anyway. If you are still together when you reach benefits age (or if a tragedy happens in order to receive benefits) you would get use of them by living together anyway. I believe a divorced spouse gets some SS benefits if the marriage lasted a long time and there was only one income earner. That you don't get but I believe a seperate contract regarding financial obligation could be entered into. Honestly, as a married person who hasn't worked in 15 years (since the kid was born---which is usually the reason one spouse doesn't work) if I divorced the hubby and it effected my SS later on I would survive, meagerly, LOL, but I'd survive.
And, again, much of the so called benefits come with liabilities attached.
You're a smart guy (you seem like a guy) and I take you as being sincere in your beliefs. There is zero chance I am going to agree with you on this. I think all of our taxes are too high and so I can support lowering your taxes AND mine so we can pay for our own stuff. There are probably plenty of issues we agree on. This isn't going to be one of them. Sorry.