The followup argument is often "well they are still being under paid." While I can buy this argument, I do not think the solution is tipping. Because if they are underpaid so are non-tipped jobs like the fast food worker, janitor, grocery worker, or movie theater employee. All tipping does is divide these people and reduce the pool for a larger collective to bargain for a higher minimum wage.
I feel we have this collective belief that tipping is bad (it sure confuses my foreign friends, who sometimes get dirty looks because they didn't tip), but once we've effectively created the criteria necessary to abolish it[3], we still maintained the cultural aspect of it: that we __need__ to tip (often thinking we'll get our food spat in if we don't). I've had others get upset with me for these opinions (I do tip btw) but I don't understand how we can think tipping shouldn't exist but continue in this direction. It's also interesting that in early America we thought of tipping as akin to bribery (I still believe this and I think this is common). It also has a history with slavery[4]
[0] https://www.dol.gov/agencies/whd/state/minimum-wage/tipped
[1] Obviously the argument no longer holds outside Alaska, California, Minnesota, Montana, Nevada, Oregon, and Washington
[2] When I was a kid (some 20 years ago) 10% was common for a standard tip. Now most places have an 18%/20%/25% option on screens. Some even higher! The second image in the article even shows a 30% tip
[3] I wouldn't completely abolish it, but I'd say it shouldn't be a standard.
[4] https://www.npr.org/2021/03/22/980047710/the-land-of-the-fee