There are lots of vague things, the idea that if something you said could be used against you in court you must have done something wrong (the only thing to which I was responding) is not one. Prosecutors are just as overzealous in civil cases as legal. Innocent things said at work can be used against someone just as well as ones said at home and in all the same ways and for all the same reasons.
What’s the famous Cardinal Richeleu quote?
I responded only because “corporations bad” is a mind virus deeply inculcated in a lot of people here, but those same people mostly would never think that just because something you said could be used against you in court that you did something either morally wrong or illegal. I wanted people to see the effect the mind virus had on their thinking.
Did anyone? No idea, probably not.
But it’s not a false equivalence at all, all the same reasoning applies whether your communication was at the office or your house, and whether it was about your dog or your code.
There are very many non-nefarious, completely legal reasons one might not want a work communication to be visible down the line, just as with personal. If someone can’t see that their thinking is cloudy and I bet they experience cognitive dissonance.