One could say that they are giving something back, by using those profits to develop ways to make computing more accessible and useful, something they're better at and more willing to invest in than anyone else.
What you are saying is Apple (and their work) is $deity's gift to the world so they don't owe anything else regardless how many billions of dollars they make from it.
People in parts of the world that need help to survive or thrive more than a meager existence, aren't helped by Apple's pretty software UI and hardware design.
If you truly believed that argument, you wouldn't be wasting your own disposable income on broadband and a cell phone.