Actually, it's not a digression. It's relevant to the discussion. Of course you don't want to spend $100 unnecessarily, but Waves is going to do everything they can to convince you otherwise.
They are indeed very good at marketing. The Apple analogy's not wrong, but I'd call them the Monster Cable of plugins: product quality is generally good, but there are plenty of less-expensive but functionally equivalent alternatives.
And although Waves has done away with the iLok requirement, they still employ an obtuse and fragile copy-protection scheme that's prone to failure.
None of this negates your initial concern about the importance of phase alignment. Any time two or more microphones are picking up the same instrument, taking phase into account is essential to capturing a full sound. But there's more than one way to accomplish that.
Think about it: how did Andy Johns pull off some of the greatest rock 'n roll drum recordings of all time -
without digital signal processing?