I'm going to summarize, and then close this thread because it doesn't appear that anything constructive will come of it. (That and rants that go on past a couple of posts don't work for me.)
1) Bottom line is that all off season conditioning, open gyms, etc. can't be made mandatory in any fashion. Any attempt to make them mandatory can be reported up through the chain Coach-AD-Principal-Board-OHSAA.
2) If you aren't going to take a complaint up the chain, ranting on here about it won't change a thing and is likely to get on people's nerves.
3) If the time for open gyms, etc. is a problem, talk to the coach and explain that because your DD can't make them you've got her seeing......
4) Private instruction can produce, but does not guarantee, better results than group instruction, so you'd better be able to prove to the coach that you've been working when the season starts.