You could say the same about any professional. You do it because it's the right thing to do, and if you don't do it, people are more likely not to work for you in the future.
It's not assuming a lot to think someone who made several hundred thousand dollars has enough to live comfortably for a few months.
I could move into a very nice apartment in any city in the world for less than $5,000/mo. I have no doubt that with that kind of cash, I could move in today. Surely after making $300,000 you would have enough left over to do the same!
If not, then you are obviously not qualified to be making that kind of compensation in the first place.
Yea everybody knows that if you’re not capable of living frugally and/or have mastered the art of personal finance you couldn’t possibly have any specialized skills or technical abilities.