The other reasons are all about 'family' - adopted or forcibly adopted into - and team. Bruce isn't exactly used to being the least isolated person in any room, but in this case he very much is.

It's strange on that level, but general concern for someone else, even in things that he accepts readily for himself? That second part is at least familiar.

Meanwhile, he has an opening and he's taking it.

"What do you want out of it? Money is a given, what specifically do you want that money directed to?"