> At that point you are beholden to your shareholders
No not really, you can issue two types of shares, the company founders can control a type of shares which has more voting power while other shareholders can get a different type of shares with less voting power.
As a PBC, the intent of the company is not only profit, but it's hard to analyze the counterfactuals of if Anthropic were a pure for-profit or a non-profit
Apparently not for Anthropic, since they've been wanting to build a larger one by force. My point is you can't build a moat by forcing people, it defeats the purpose.