Imagine you walked into a group of people, talking about one thing.
You started talking about something completely random and different.
They want to continue their conversation, you keep interjecting with questions about your random thing.
If they could, they'd probably turn you off so you couldn't talk, or go to another place to talk about it.
That's precisely what happened here.
What more is there to say?
I think there's nothing special about refusing to discuss stuff there and disabling comments.
I suspect that there will be many such reports in coming weeks. And lots of denial, and refusal to comment.
And yes, maybe he was just stressed out, and didn't want to be pestered with conspiracy theory ;)
(... that said, it's not like revoking sessions would impede a password-holding adversary...)
The only exception I could imagine would be some service that was brought in as part of an acquisition but has not yet been migrated to Google's internal platform. Obviously not applicable to products like Gmail or other core G Suite apps.