Everyone and they momma go to a private instructor now. Most of us, 30 years ago, before the dawn of every few blocks there is a TB team, learned skills from our father who played the game.
I was just having this same discussion with a mom on my DD's team today. IMO the difference is that nowadays TB starts at 8YO so there is an elevated expectation of young girls. In my TB playing days 25 years ago the teams started at 14U so the younger kids developed their skills on their own with Dad or little league coach. No girls were throwing windmill at 45 mph at 10YO in the good old days. There wasn't this sense of competitiveness to be on an elite TB team at 10U so either you had it or you didn't by the time you were ready for TB.
As far as discipline goes, I'm all for a strict coach who raises the expectations of his players for themselves. I'd take that over a nicey nice coach any day. I'm also not a fan of the extreme coach who barks at his kids when they do something wrong but doesn't show the same intensity when they do something well. There needs to be a balance. Coaching by fear isn't the answer. Coaching with discipline at all age levels is ideal in my book. DD's coach makes the team run on rare occasions and when he does, DD usually does more laps on her own. I can only surmise that she thinks it's fun.