He had a choice to either hear that she was experience pain/duress or that she’s exaggerating and/or misunderstanding.

And she had a chance to communicate her frustrations without making an ultimatum.

That he immediately dismissed her and only talked of himself makes it clear that he’s an uncaring narcissist.

That she immediately issued an ultimatum instead of trying to open a productive dialogue about it more strongly suggests that she’s the uncaring narcissist. Ultimatums aren’t healthy.