I think everyone is difficult and I don't believe it's the right approach to seperate humans in 2 groups like us and them,... it's probably difficult for many of us... and maybe it helps to keep that in mind when you get back from school, exhausted by this difficulty.
I mean, every brain is different... I don't even know if there is something like neurotypical. I would assume, everyone is neurodiverse. How to prove otherwise? It's not in my range of skills.
Altough I get the joke, that's probably what I would have told my child. Another point: why lough about an accident? Just trying to imagine what I would have felt in that situation.