While I understand that, having read the Twitter thread of the panelist who was offended by the utterance, I think it's a bit of a reach to say that she would've been unsatisfied.
I'm not saying she would or wouldn't have. I'm saying that, in the moment, the organization likely had concerns.
Step back to just after this happened. The twitter thread you reference hasn't happened yet, I expect. The organization has had a complaint about a Major Name. What do they do? This becomes a problem of risk mitigation, for the organization.
They do not know what will satisfy the offended person. And, beyond that, they have public opinion to consider - satisfying the person who lodged the complaint may not be sufficient. Wider fandom will hear about this, and have opinions. This kind of thing has turned into social media PR nightmares before.