The practices that consumer protection laws guard against often historically took the form of contracts so I'm not sure you've got much of an argument there. IMO the much stronger position is to argue the intent behind the common practice but cisco vesting monthly seems like a decent counterpoint.

My argument is that it’s not wage theft by any legal definition.

And yes, obviously a contract can be declared void, but have consumer protection agencies started going after companies for not vesting immediately after a layoff? If not, then I don’t see how that’s relevant.