Yeah you see this is why we're calling tip culture toxic, if it makes you unable to appreciate someone doing you a favour, no matter how small, you are the problem, not the others with their weird "minimal wage actually sufficient to live" society. Most often, we tip 1 or 2 euros to our waiter if we enjoyed our meal, as a small thank you, and because we know they can otherwise get paid a true living wage just from the price we paid in the first place.

Its more about going to a round number so no bothering with change.