Yes, but even taxis aren't "driving to work", they are at work.

They can be "at work" somewhere other than illegally parked in the bike lane waiting around or on break.

Of course they can, and should, but this does not make it relevant to bring in the argument "only 25% of people drive to work".

I still don't understand how this is relevant. You are not allowed to park in bike lanes, full stop. It doesn't matter why you are going somewhere; it's still illegal regardless of whether you're going to work, or going shopping, or whatever.

Given that most people in Manhattan do not drive, it makes sense to prioritize non-drivers over drivers.