Yes, I agree it is a loathsome custom that we have bamboozled ourselves into accepting as normal. I don't think I will ever be thick-skinned enough to not tip at all. I come from a family of lower-class origins (immigrants and farmers) who worked their way up to middle-class, so I feel solidarity with food-service workers and hotel maids, etc... who perform demanding jobs for minimum wages, but yes I find Asia's culture with regard to this to be much more civilized. The US culture sort of accepts the fact that the server does not make a living wage. But instead of making the business owner ashamed of this, the shame and guilt is placed on the customer. And Americans are conditioned to think this is proper - or shrug their shoulders with an unspoken English version of "shigataganai".
I think there is a certain amount of grift built into the system as well, since cash tips are universally under-reported as income.
Just one of the examples where I find US culture to be inferior to Asia. Even Europe, where a rounding up, or maybe a 10% tip for extraordinary service, is superior to the US system where the customer obliged to choose a tip amount from a screen. There was a phrase used with regard to this same topic here a couple of years ago. I'll see if I can find it. Something like "equal parts shame and extortion" or words to that effect.