Yeah, I agree. Only in extreme cases would I reduce a tip below 20%. I consider 20% simply the cost of that service, not a "bonus" I get to bestow upon lowly service workers based on how satisfied my royal person is. And that's the way wages work in service industry - wages are low because tips are expected. They rely on tips. So we absolutely should tip even if it's not table service.

And since the pandemic, which helped remind me how shitty service workers generally have it, I have tried to tip above 20% as a default.