Earlier quoted context omitted.
Drivers on Uber are contractors. Isn't it each driver's choice to decide if they want to strike or not?
It absolutely is. This doesn't make scabbing any less vile, however. All it has guaranteed in this instance is that a bunch of hapless Uber drivers are going to be feeling the backlash. Friends don't let friends scab.
"If you don't actively participate in my exact form of political activism, you're a bad person!"
This is the kind of rhetoric that pushed a ton of people on the fence towards Trump. For some reason, it's a common leftist tactic right now to insist that if you aren't actively engaged in whatever form of extremism the speaker is advocating, you are evil and (propping up the man | part of the patriarchy | oppressing | a literal nazi | etc.). Entirely predictably, this is likely to alienate anyone even slightly to the right of the speaker and push them further right.
Maybe most Uber drivers don't really want to protest in this way. Maybe they agree with Trump. (Probably not, given that it's Manhattan, but who knows.) Maybe they feel like they don't have all the facts and don't want to make a stand based on an incomplete understanding. Either way, attacking them for it is counterproductive for you.