"net win for humanity" can be taken two ways. Elon / Jeff not making it back could also be considered a "win" even if dark. For the good they have done they have done a lot of damage to humanity on their way to become billionaires.
- https://en.wikipedia.org/wiki/Amazon_(company)#Controversies
- https://en.wikipedia.org/wiki/Tesla,_Inc.#Lawsuits_and_contr...
I did not request every incident, but just one concrete example that would validate the quite strong characterization.
In the United States being sued is not a proof of guilt, it's just a proof of being sued.
This is unlike in some other countries, where the guilt of the person is presupposed and the purpose of the court ruling is just to make it official.
Even if you think they shouldn't gamble with their money I find it hard to argue there was no damage done.
Propping up a bubble destined to pop is bad too, so why get involved?
To the second point, you should look into the definition of monopoly. Amazon is a behemoth, not a monopoly. And they have created immense value.