The problem with Disneyland is that once you go there it's the whole ball of wax. You'd have a hard time telling people they can send their kid to Disneyland, but not to school or outdoor sports. You'd have a hard time telling the outdoor arenas they can't even open at half capacity. You'd have a hard time arguing to the churches they can't reopen at full capacity. You remove any justification for keeping the playgrounds closed.
California already saw that with the nail salon industry....if you open hair salons it's really hard to say no to the nail salons. What's worse is that everyone knows viruses tranmit at Disneyland due to the measles outbreak there. And we also know from Disney fan behavior over Labor Day in Downtown Disney that they will congregate.
So what's happening here is that California is caught between a rock and a hard place, with places like Anaheim screaming to open it up, but places like La County screaming to keep it closed (Universal would be next and they know the knives will be out for the schools to be open...remember La County isn't even giving elementary schools waivers). Think of the visuals: kids frolicking at Disneyland (which even in lower capacity can get congested at spots) then images of schools closed.