I cant understand why a simple job of serving food has to be complicated by tipping? I can hardly recall any instance where a waiter served food "incorrectly " and did not earn their 15% tip. I am sure you have your horror stories, but these are the exception, not the rule.

Why can't restaurant owners pay waiters a decent hourly wage and pass the cost onto the customer?

By the way, I just returned from a month trip to the Far East, where there is no tipping. Much more enjoyable dining experience in my opinion!
Receive bill , pay it then leave. No mental arithmetic to determine whether this waiter deserved 12%, 16% or 18.5% tip based on how precisely they served your food. I can't imagine anyone who enjoys doing this! Then you have to constantly worry if the waiter hates you because you only tipped them 13% instead of the usual 15%.

All it would take is some big chain restaurant to abolish it and all others would follow suit. Can you imagine the buzz/hype it would create for the first restaurant to do so?