I don't think that factors. People chose to be Christian in a time when it was a death sentence. Cost/benefit is a subjective thing.Why ould anyone "choose" to be gay in a world which is so hostile to gay people ?
I've long suspected there are two sorts of people. The first is fairly hardwired for their sexual preference. The second isn't and exist more along an ambiguous line, with greater and lesser degrees of interest divided among both sexes. In that case if isn't surprising that most people who have a greater degree of control over the expression and focus of their sexual interest are the sort who tend to settle into traditional roles for a number of reasons, but may have had "experimentation" at some stage of their sexual development, the sort often heard of in college environments where the social atmosphere is loose and choices can be made without the same consequence for the person dabbling.
I think presenting the whole shooting match as choice is a bit simplistic and contrary to the experience of some of us who haven't felt ambiguous on point, but I don't really see why it matters whether or not a person is hard wired or predisposed by some other means if we are both capable of refraining from impulse and remain responsible for our choices, morally, else.