Homeschooling is their parents way of trying to prevent this kind of thing. TL;DR, OP is ignant. 'Nuff said.
If anyone is "ignant" in this situation it is the parents. The parents aren't doing anything, but making it worse for them later on in life. These girls have more than likely never drank, had sex, or been to a social event (concert, house party, w.e). What do you think is going to happen to them once they are away at college or living on their own? They've never had alcohol so they won't have any idea what their limits are. They've probably never been to a sex ed class, or had any experience dealing with peer pressure. There is nothing wrong with setting boundaries and establishing guidelines with your kids, but locking your daughters up like fucking Rapunzel is ridiculous and will only hurt them later on in life .
As a part of your "sponsorship" you have to buy a new DM12 or NT? I'm sure you'll get a discount compared to what'd it cost in a store, but if everyone already has nice gear (since you are a team, I'm sure they do) why not just invest the money in paint and entry to practice. Unless Dye is really helping you guys out with other costs (paint, entry, travel), it doesn't sound like a very worthwhile sponsorship to have.