Umm, no, that 20 week extension has already been used, EDD automatically added that to the unemployment.
But let's assume you are right, most CMs are getting around $250 a week in unemployment without the extra $300 (which has now ended in California unless they get an extension and more funding for it). This means they would need to live off of $1,000 per month before taxes for rent, food, car payments, clothing, etc.
Oh, and if the theme parks are closed much longer all of them will be laid off and then they have to come up with $1,000 per month for health insurance or get fined for not having it. They won't qualify for assistance with health insurance, because the extra $300 to $600 and unemployment count as income towards determining eligibility. So that leaves them with $0 per month to live off of.
Not going to work well. It is time to reopen.