Earlier quoted context omitted.
The entire point is that tipping shouldn't make the difference between being able to pay your heating bill. Tipping, as it exists in the US, is pretty much a dark pattern.
"Shouldn't" and "doesn't" are worlds apart. I think most people hate tipping because they hate when people ask for tips. But a formal tipping system might reduce the number of Uber drivers who already ask for tips.
I tip 22% for full service, 10% for partial. If I go to the bar, I tip 10%, or a dollar/drink if I'm paying cash. If I'm ordering takeaway somewhere, I tip around 5%. I have no idea which of these are reasonable or not, because there is no "tipping class". I have no idea if places I regularly go like to spit in my food because I tip like shit.