it doesn't deny that many people first claim to be bi before accepting themselves as homo

I can relate to that. Long before I ever told a single soul, I was in denial about my sexuality because I simply didn't understand it or know much about homosexuality at the time. I went from a rediculous 12 year old's idea of "I'm straight and I'll get a wife one day, I just really like looking at unclothed men" to "I'm bisexual" before finally acknowledging my homosexuality years later. I never was actually bisexual, but falsely identifying as such was a step in my acceptance of myself. As long as homosexuals do grow out of identifying as bisexual before too long, I don't think there is much problem with it, but I'm not qualified to speak on the ramifications of that kind of thing.