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.
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?
The only real difference is the historical body count.