If I was a member of Twitter's board, Musk's history of erratic public behavior, SEC settlement, and openly hostile attitude towards the company's employees would be more than sufficient to justify my belief that his controlling ownership would not be in the interest of the current average shareholder.
That opinion would also be consistent with how "fiduciary duty" is interpreted by US regulators: companies are not required to perform any particular action that might reasonably be in the interests of shareholders; they must merely show that the company's actions were intended to be in the best interests of the shareholders.
That opinion would also be consistent with how "fiduciary duty" is interpreted by US regulators: companies are not required to perform any particular action that might reasonably be in the interests of shareholders; they must merely show that the company's actions were intended to be in the best interests of the shareholders.