Well, I finally cancelled my flights with Southwest. I really didn't want to because I'd still go if Disney would let me in, but the whole thing was incredibly painless.
Southwest refunded the non-refundable early bird without me even asking about it and my travel credits don't expire until 2022, so that's nice. The whole thing took about 5 minutes from when I dialed the phone until it was all done. Hopefully this thine ends sooner rather than later, but I guess we'll see. I'm still weighing if I want to make a July trip or not.