I disagree at least a bit. You cannot take care of others if you cannot take care of yourself. Life is fractal and you should be at peace with yourself first.
My experience is that it's not binary like that. A lot of people develop through taking care of others (parenthood). And then as I say in post - a lot of people never make it about others. I've witnessed many millionaires (some self made) who are still running self actualization threadmill - oh, when I have tens of millions - then. Then they get that... but are further away from finding peace.