I am not getting back into that one.
However, would your mind change if it were shown NOT to be a choice? How would it change your view of this? In addition to this, is there anything that would prove that to you? Some are so convinced that it is a sin that they would not be open to any scientific discovery. Sort of like the world is flat view.
Seriously, though, I think you hit the nail on the head. That is the argument against Gay persons being able to marry and have all the same rights and privilages as Heterosexuals.