It reminds me of when I was a "Cub", we had a couple of girl members and several female leaders. I didn't think anything of it at the time but I remember one lunch time one of the girl cubs (who went to my school) grabbed me (literally - she was two years older and bigger!) from playing football so I could tell a dinner lady who didn't believe that she was a cub. It was all in good fun but actually before that moment I'd never really got that one was for girls and one was for boys, I just thought you could choose freely. And, well, I suppose you can!
So "bigoted" is probably more fair.
The only real difference is the historical body count.
And hey, the Girl Scouts are bigoted against boys, right? That's pretty disingenious; they are purpose-selective in accordance with massive issues with prepubescent youth. Pretty hard to mentor boys when they're constantly showing off to girls - try to change that!
I'm glad your experience was good. 8 years - so you must be an Eagle Scout? Or do you do that differently?