In my RPGing, I don't force players to come up with goals, or to care about the other PCs.
I take it for granted, as part of RPGing, in the same way that I take it for granted that (say) when we're playing five hundred, everyone at the table will try and bid sensibly, try and win their tricks, etc.
It's what RPGing is about.
Change "It's what RPGing is about." to "It's what RPGing is about for me." and I have no problem with the statement. You do you.
Saying that it must be part of the game, that it's bizzaro world if it's not part of the game, implying or stating that the GM or rules of the game have much of anything to do with it? That's what I have a problem with.
There is no one true way.