A couple of points to your rant there Grandpa,
1. Most of the coaches have paid their dues, in fact many have starved themselves well beyond anything some of these kids could imagine which brings up the second items.
2. Hydration, whether you agree with it or not, is intended to keep the kids healthy rather than see kids cut weight the way it used to be done, and believe me I am not that old and I have some stories. The second weigh-in keeps the kids from ballooning up and forcing them to cut all that extra weight the next week.

Best interest of the kids.