So I go out with a rich friend and they want to stop and get a drink in a bar they like the look of, they buy us each a pint and it costs $14. Later I have to send them seven dollars which means I have to cut down on my food shopping and worry about spending, maybe I have to cancel going out with another friend.
They don't care about this and nor do you, the only thing that matters is the rich person might feel anxious about their social status? That's total bullshit, don't you think I'd feel shitty sitting there not drinking with them or ruining their evening by declining the suggestion to stop for a drink like I would alone? When do my social fears matter in this equation? Oh of course, never because it was written by some affluent fuckwit trying to justify the fact all their old friends find them insufferable.
'They don't care about the 4 dollars' quote actually translates to 'they don't care about you as a person or any difficulties you might go through in a practical sense because a lingering self-doubt that everyone has regardless of the situation trumps all'
Everyone worries that their friends don't really like them, it's part of being human. Pushing that onto your friend as a practical problem when they already have the many emotional, psychological, and practical worries associated with the situation is a selfish dick move.