Yes, the two spare aircraft are currently in KBFI and Victorville, significantly delayed by Boeing.
As for Skiathos, the problem is the inflexibility. If the airline only has, say, 10 JSI trained captains then there is absolutely no scope for them to be moved onto other duties that would jeopardise the JSI. And when they do go sick/fatigued/out of hours, there’s only a small pool of people able to cover, so there’s a high probability it would end up being delayed anyway. And I know the obvious answer is to train more people for Skiathos, but there is absolutely no spare capacity in anybody’s training program for that after the Covid shutdown.
Agree with everything you say about the government though. They’ve proven how quickly they’re willing to turn the aviation industry off, who in their right mind would take a low paid job loading bags or sitting in a windowless room for 12 hours frisking people and asking passenger after passenger if they’ve taken their liquids out of their bags, when they can get a far more secure job at Amazon (or sit on the dole). Plenty of cabin crew have left the industry for more secure roles at estate agents etc, and replacing all of these people requires vetting by, who else, a government agency.