I'm not sure how many wealthy people care about inequality.
I used to work with a multi-millionaire who thought everybody that was poor just didn't work as hard as him / wasn't as smart as him. He thought everybody should work 2 jobs and go to school in order to better themselves.
Why not do it? Why does everyone else have to do something first?
I'm not asking everyone else to do it first. I'm asking everyone to do it together.
You'd actually see the difference you're making, instead of feeling helpless about massive issues.
Actually doing something takes effort, and is hard, and is risky.
Yes, there will always be inequality. Yes, that is a good thing. But that is no excuse to the current level of wealth disparity.
Plus, the sheer magnitude of inequality is immense in the area of wealth. It follows an exponential distribution; those other things you mentioned follow a normal distribution.
This is an underrated point; capitalism with billionaires is crony capitalism.