Yes, mine is mentally robust too, like you, we've needed to be.
However, 'just get over it', isn't actually talking resilience, it's talking possible denial of a real impact felt by an individual, which could be detrimental if not actually acknowledged and dealt with in a meaningful way.
Saw quite a bit of it with parents and teachers after the quakes, when kids were suffering real mental impact, to the point of serious trauma. 'Just get over it', 'it is what it is', 'well, worse things happen at sea'?
Not particularly useful to the kids, had to be said. Generally speaking, those kids who didn't get their trauma acknowledged, and constructively dealt with (eg. counselling, CBT), went on to suffer more serious adverse consequences, with longer lasting negative impacts.
I'm not saying 'schools must open for my kid's mental health'. I'm saying that I know it will have a very positive impact on my kid's mental health if they can safely reopen - for pupils and teachers, and other members of staff. Slight difference.