I’m not giving him credit, but we don’t know what their relationship is like. Maybe they had already spoken about the wait and watch before she captured that scene. He can’t force her to do anything, she’s the sole decision maker at the end of the day and if the doctors suggest WW, they also know better. The doctors wouldn’t have suggested WW if they didn’t see any point in it. He’s not the doctor here, so he just suggested one of the options that were given.
We don’t know the ins and outs of a relationship. About him visiting home, maybe there’s something going on with his family or he’s struggling mentally. Again, we only know what Tiffany wants to show. Not fair to judge someone without knowing the full details.