Ah, that's bullshit. I've been all over the world and I'm guessing by your comment I'm more travelled than you. Currently, I'm in the Philippines, where there's no tipping. Go ahead, come down here on a trip and see what happens. No tipping. And the service is abysmal because nobody has any incentive to be an excellent waiter or waitress.
What you don't understand is that tipping became a thing in order to reward good service and provide a decent income to service workers. It's not perfect, but it's there for a reason.
I just finished saying that I've been all over Japan. And you missed where I said that Japanese culture is in many ways exceptional and not like other cultures. It's not like the rest of SE Asia, for instance, where there's no tipping and you have to wait for a half hour to get your cheque.
What you don't understand is that tipping became a thing in order to reward good service and provide a decent income to service workers. It's not perfect, but it's there for a reason.