thanks for not answering a thing I asked. why reply?
He really did answer your 50 questions with one concise answer. With youth sports today there are club teams, parent led and rec. Clubs (at least in DM area) may pay coaches $1500-$3000 (depending on sport). So most of the better coaches will go club vs. rec. The exception is a parent led team where the coach has a kid on the team.
In a sport like soccer, which is just becoming popular, many coaches never played the sport. They may have a kid on the team and have been drafted to coach. The other societal reality is expectations of parents and athletes differs between boys and girls- at least up to about middle school. The social aspect plays a bigger part in the parents and kids reason to PLAY.