Yes. The service has a set price and no one is entitled to tips. They willingly took the risk of working in an underpaid job with the expectation of charity by others.

Thus essentially bringing damage to the labor market because restaurants and delivery services now have an incentive to pay under what would be the market rate if not for the perverse social norm of tipping which distorts the free market.

TL;DR If you give people tips, you may secretly be a communist trying to subvert American ideals of free market and hard work