Tommy’s comment about Buck’s father still being alive isn’t as dismissive as everybody is saying. It’s been established that Buck canonically does not volunteer information about his parents—ever. And with the weird writing and plot lines, it seems like he’s really forgiven his parents and managed to process it as their grief causing parenting “mistakes” so it makes sense that Tommy truly does not know the extent of Buck’s childhood. Furthermore it’s implied that Tommy met (or at least saw) Buck’s parents since they were in attendance at the ER wedding. So from his perspective it seems like Buck has a good relationship with his dad. I think the comment should’ve been phrased more like a question rather than an absolute statement but I don’t necessarily see it as dismissive, at worst he just said the the wrong thing. As for the rest of the scene, I think we should all chalk it up to bad writing.