Schools are in big financial trouble these days. We've always operated on a shoestring budget, and things are getting worse. Classroom numbers are up. Supply budgets are down. Things that aren't absolutely manadatory are disappearing -- things that ARE necessary are disappearing.
No one's saying, "Hey, let's cut kindergarten just to be mean!"
Rather, school systems are saying, "Something has to go. Should we put 35 kids in the 4th grade class? Close the school library three days a week? Cut out AP classes for our best and brightest? Cut remediation services for the slower kids? Get rid of vocational classes that prepare non-college bound students for the work world? Or maybe cut football, although it pays for all the other sports in high school?" Of course, I'm making up these examples, but I guarantee they're the kind of choices principals are forced to make.
Add in that EVERY CUT upsets SOMEONE. Every cut will bring parental complaints. Some cuts will bring the threat of lawsuits.
Yeah, it's awful, but I can see why they want to start with non-mandatory programs.