Ah, I see! I was a bit annoyed by you seemingly pointlessly correcting the parent, but now I understand your PoV.

> In context, me saying 'You can just do that' means 'You should do that'

That's not very consistent. You wrote that whether they should was another question.

> (barring there being good reason, which I haven't seen so far)

I disagree with you. Someone being autonomous is a good reason for not wanting to take a decision for them against their will.

It follows that:

> It's still used by some people to close doors and remove options without good reason

This didn't happen here. No doors were closed without a good reason, because there is one.