I'm not sure what he would have done with the information. However, it strikes me as an odd idea that just because he can't do anything, it means he has no right to know.
My step children are out-and-out forbidden from talking about my husband while on mum's time. If they do talk about him, they must call him by his first name. (Which I personally don't agree with at all, but I understand it divides opinion on MN.)
I think, even if he couldn't be in the hospital, that my husband would have liked to have been given the opportunity to reassure his child. Check in. Tell them it's going to be okay. That he loves them. Normal parent things when your child is hurt and vulnerable.
When he realised his child had been in an ambulance and then spent the night in hospital, he cried and said "I just want to scoop them up and make it better"
So, again, I don't know what he would have done with the information. Nothing practical and useful, I suppose.
It really isn't that he wanted the opportunity to storm into the hospital and start shouting bloody murder at his ex wife.
Somewhere along the way, it has been forgotten that this is about a child and not just about his ex wife. She doesn't own the children. They aren't just an appendage to her. They don't cease to exist, except in relation to her.
It's also a bit weird that so many people here think the extent to which he's allowed to parent his children should be linked to how much of his fault the divorce was.
They divorced because of a misdemeanour on her part, not his. But it isn't relevant because it certainly doesn't make her any less of a mother.
I have a really lovely relationship with my own father and I did find him to be a source of warmth and comfort when I was growing up. I didn't find him to be "less" than my mum in any way. I don't think it's that unusual for a father to actually be a caring parent. 🤷🏻♀️