I have no idea how you would become that rich without awful exploitation of consumers or workers.

You'll find lots of "how they did it" in the biography/business section of the library/bookstore.

Great idea + great execution. Lots of people have made impressive fortunes from widely used everyday things like food packaging (eg Tetra Pak), ballpoint pens (Biro) or escalators (Kone).

This ignores that in order to become rich, you must be paid more money than you can generate with your own labor. You must have your workers make something for cheaper than you sell it for and take the excess and give it to yourself. This is business, and there is literally no way to become wealthy without severe exploitation.

Some exceptions: the lottery (which abuses the desperate), inheritance (which has no meritorious justification)

That's a pretty reductionist view of wealth creation and capitalism.

I hope the inherent irony of making that statement to an audience of people united by a common interest in technological progress, entrepreneurship, and startups (on a forum maintained by the world's most recognized startup accelerator) isn't lost on you.