What? Because it has nothing to do with "getting drunk and molesting an intern or tossing out racial slurs at say, some important person at a giant japanese company".
Also I made no claim of anything, just that dismissal can happen for a large variety of reasons. The Arcimoto CEO, for instance, was let go because he couldn't hold his liquor and got a DUI. Brendan Eich got booted from Mozilla for having a political ideology that Mozilla considered a liability.
All kinds of reasons.
The biggest risk for OpenAI is the public perception that the discretion of ChatGPT can not be trusted. If the CEO is caught using poor discretion, the public will transfer that property to the company's products.
For instance, if Tesla could fire Elon Musk, I'm sure they would have by now.
The implication is that this could be the 'unrelated reason', that he lied to the board about sexually assaulting his sister/step-sister/whatever. Of course, I'm not sure who Annie Altman is or how exactly she is related to Sam or if the allegations are true.