agree with it, say what? simply pointing out that actions have consequences. don't poke the bear.
in the US, where the bulk of those urban myths seem to arise, tips are what the service staff live on. that's the game. hate the game not the place. don't tip the standard 15% and they've effectively worked for nothing. maybe they won't make the rent or cant buy Chrissy presents for their kids.
but you sound like you don't have much practical life experience so I CBF trying to explain any further. kthxbye ????