The biggest problem here is that this is one of the most "expendable" workforces we've ever seen–hiring cost is rock-bottom, training is done through an app (requiring no human interaction or pay), and shoppers are just sent a shirt and prepaid card (Shipt) or a lanyard and card (Instacart).
I feel like the organizers understand this and know that if the overlords decide they don't want to deal with the strike, their accounts can be deactivated with the click of a mouse, wasting less than $50 in resources (though usually less because of the ROI they've already exhibited). All the company has to do is ramp up advertising or add some new hire incentives.
Keeping the demands reasonable is how they're self-preserving. Anything too extreme, and they just get replaced with no change. It's a good _starting point_, but there definitely need to be more protections for our gig economy workers in the future.