Everything else aside - in what world is Sam Altman “more effective” than Zuck? How do you even define effective?
I think they both believe they are good and doing good.
People tend to be more suspicious of Mark Zuckerberg's motives than Sam Altman's.
Sam Altman himself even said he can't be trusted but that was ok because of the company structure and then, when he needed to, overpowered that structure he claimed was necessary: https://x.com/tobyordoxford/status/1727624526450581571?s=20