If they were giving it away for free and paying a non-zero cost to do it, that's not sustainable. And that clearly isn't taking all the benefit for themselves. This is a take so bad, it isn't a take anymore...its a personality flaw.
Literally nobody is making that claim. Nobody expects businesses to be charities.
The thing being argued against is businesses solely being viewed as a "get rich quick" gambling scheme, where the only thing that matters is a rapid rise in shareholder value. VCs don't want a company providing a steady retirement fund, they want you to go for a 1000x return or die trying. The logical end result is that you screw over your customers and employees whenever possible, and burn the entire thing to the ground for the last few bucks. Just look at what Broadcom is doing to VMware: they might've delivered some great shareholder value, but they did huge damage to society in the process!
We shouldn't allow businesses to operate like a cancer which grows forever until it eventually kills its host, leeching off as much in the process as possible. If you want sustainability, you should be clamoring for businesses which are happy to just operate: employ some people, provide a valuable service to society, and make some profit - no need to take over the world in a crazy frenzy chasing unlimited growth.
