Not the same, because you are arbitrarily excluding groups due to invalid criteria. The fact that gay people don't want to marry the opposite sex does not mean they have the right to a compensatory privilege. That's like saying that since I choose not to avail myself of the privilege of driving a motor vehicle, I may instead choose to utilize the public roads in a different manner that will impede the ability of licensed drivers to use them for their proper function, such as by pushing a wheelbarrow down the fast lane of a major highway. You can make all specious arguments you want about my right to move goods by the fastest route available, or how environmentally superior my mode of transport is, but it does not change the fact that I am abusing something in an illegal manner and my desire to use a public institution in my own way does not grant me the right to do so.