Imagine if wealthy Bay Area denizens would focus their resources to take care of those around them. Instead they occupy their time with the endless pursuit of vanity, wealth without purpose, and decadence.
Some lower-tax (lower than California) destinations are incredible places to live as well - it’s not a choice between anarcho-capitalism and California.
So there’s at least a tiny bit of generosity there.
Neither is "donating" your income to your own charitable organization, which is a well-established tax avoidance scheme rather than actual humanitarianism.