Tipping culture in the US

I'd like to be educated on this topic, but I just wanna know why it's so frowned upon to not tip? When like the rest of the world like even Japan and Korea who don't encourage it just seems fine? I'm confused as to why the paycheck of the workers relies so heavily on the customers tipping and not the managers and people above. I mean for all I see, it's obviously corruption. Like I saw a worker recently who apparently has "0" In their paycheck, which isn't that just illegal? They say that the "prices will go up" But from where I'm from, third world country btw the prices are still somewhat cheap that college students and highschool can afford it. Yet though not that high, they still get paid for some people decent and extra money. Still waiters don't even expect a tip nor is it heavily frowned upon.

I just can't really understand why so many of these people genuinely seem to guilt trip (imo) customers because "they're not being paid enough" cus shouldn't the hate be on the government? The system? The rich guys basically enslaving you?