Union benefits worth pay cut?

I've been working in higher ed admin at a private professional school for about 5 years. My boss is great, the dean is good, there's a lot of good people. I have good work life balance which I need because I have two elementary age kids with special needs. I'm now in the end stages of interviews with a public professional school to do basically the same job. The pay is going to be about $13k less than my current job. However, the health insurance is free instead of $550/month, and the position is part of a huge public sector union, including a pension plan that vests if you stay 5 years. I'm mostly worried that the person I would be reporting to could be less flexible than my current boss, with less wfh, and that I'll regret the pay cut.

are the union benefits worth the downsides?