I wouldn't want a person in my team voicing sexists opinions, I would want that person removed from the team. Let alone as a figurehead and leadership figure.
But this is presuming that Stallman's behavior was only personal in the first place. He has a history of poor behavior at MIT and in his roles for the FSF, which definitely bleeds into the professional.
That's a position with enormous rhetorical value to you. You can use that framing to turn a conversation about a man's actions over time into a philosophical question.
That way you can avoid any inconvenient particular facts.
You can decide this is punishment and it might feel that way to RMS, but I think we can all agree sexism is a bad trait to have in the most senior leadership position of an organization founded around principles of liberty in expression and action. RMS was bad for that cause, and he couldn't keep his position on pure tenure and prestige anymore.
As we all know, real liberty is when one person has power over others who object to it.
