Tipping is good.
I’m American and have worked in the service industry in the US and Germany. I fully support tipping in the US, because waiting tables is one of the few jobs in the US where you can actually earn a good living without breaking your body (as much as construction, as a comparison) and without a training program. In a place where unions actually make a difference, it’s just a nice thing to do, and that’s obviously a better solution generally, but that’s not currently the case in the US.
There’s the reading comprehension 😉