The only way to enforce such law would be to have an oracle that tells you which actions would maximize profits. Obviously such oracle doesn't exist, and even i

The only way to enforce such law would be to have an oracle that tells you which actions would maximize profits. Obviously such oracle doesn't exist, and even if it did, it would not come from legal system. What legal system can do fairly well, however, is to punish actions that are intentionally harmful to the company. E.g. as a CEO you can't just give yourself a salary equal to company revenue. You can't sign a contract with unfavorable terms with a company that you "happen" to own.