I live just a few towns over from you - and our kids get those programs. They also go outside unless it is pouring or horribly frigid (or if there's black ice). Parents are instructed to send in snowpants and hats etc. so that all kids are properly dressed for winter. It's not an option.
I have a friend who is a kindergarten teacher. A lot of art is included in kindergarten as part of the lesson plans. She also includes some music - they listen to things but also sing songs that have some connection with what they are working on. It's not enough by itself but you should check on things like that. I think the kids go elsewhere for music, but the art teacher comes to them with a traveling cart of whatever they're going to be working on. The whole school has PE but also works on routines and games for an annual field day. Some of those are set to music so it combines physical movement with music. There's also a huge musical play put on every year by one of the grades with music and dancing - it takes months to work on.
I think it's interesting that parents are willing to pay extra for kids to go to other programs after school (art, karate, gymnastics, piano lessons) but they often don't get active in schools. A lot of schools have parents do a ton of fundraising that goes into enrichment programs. But a lot of people vote for the "no taxes" candidates for state office and school committee thinking it's saving them money - then they get their kids in schools that area missing these key activities and they have to spend their own money for outside programs. Seems self-defeating.
I'm not sure I would blame the governor of any state. I would blame the federal No Child Left Behind policy that we are stuck with unless people get their current representatives to undo it. The Congress passes bills and the State Senate/Legislature passes bills that determine the funding amount. But the allocation of spending is determined by your town and school committee.
Your best bet is to organize parents, work with the parent organization of your school, and get informed. Starting your own program after school might not work - liability issues if it's on school property. But it's more important to get an organized and informed group motivated.