sir.prize (excellent name by the way), the reason who so many gay men and women feel, or have felt, the need to stay in the closet is to avoid the the negative attitudes of families, friends, co-workers etc.
Like I said before, that's changing. An 18 year old gay lad or lesbian doesn't have as much to fear in terms of social exclusion that they did, say, 20 years back.
I mean, do you remember Boy George claiming that he preferred a cup of tea to sex?
That was what it was like back in 1983, and the man was wearing a frock for goodness sake.
Now, it's way better.
Personally, I think lesbians make fantastic parents. I know a couple and their kids are cherished as much as any straight couple.
I know a gay male couple, and whilst they're fine dads, they do tend to listen to rubbish music, which I suppose could be damaging in the long term to their kids.