I worked in the service industry for a while and have literally never cared about tips, in the sense that the default expectation in 99% of cases is no tip and the rare time I got a tip it was a few euros extra at most. Of course, I didn't care because it actually paid an actual wage, vs the weird shit you yanks are up to.

Hell, I know some people who have been working at restaurants as waiters for a long time now, and they live perfectly comfortably with 0 expectations around tips.

I still don't tip, basically ever, my only exception is the rare time I get food delivered, because unlike a regular service job the apps don't pay a livable wage and the cut they take is gargantuan compared to what the drivers get.