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I tip at sit-down restaurants and my barber.  That is it.
Honestly, it feels like you see the tip line on things, and are assuming that means "this is a socially acceptable place to tip, and all tips are 15-20%."
Let's talk about a coffee for a second.  Previous to credit cards being ubiquitous, there was a tip jar, but if you put anything into it at all, it was expected to be "I don't want to carry loose change around" rather than 15-20%.  Then, credit cards took off, and almost nobody paid with cash, so credit card companies added a way to add a tip there.
Yes, restaurants are a "required" tip of 15-20% when eating in due to special wages.  But I'll be honest, I have no idea who gets the money if you order to go, so I rarely tip for that (the exception is places I want to support extra.)
The only other real "required" tip is delivery, because it is often using their vehicle and gas and another low rate.
Everything else you mentioned isn't required in the slightest...it's just an option that is visible because most people don't use cash anymore. >

The required tip is 10%. That is the assumed tip that they are taxed on as income so they lose money if you don't tip at least 10%. The 15% minimum tip is the result of a very effective social media campaign by all the servers in the world. In the 80s and 90s anything above 12% was above and beyond. Source: I'm old and used to wait tables. >

I mean this in the best of ways, but the world has changed drasticaly and the standards, at least where I have lived, have changed drastically, where 10% is a "you did poorly, but I understand I shouldn't completely shaft you" tip. >

I hear what you're saying about 10%, but to bend this further, tipping suggestions increasing recently past 15% (like when the machine says 18/22/25) are IMHO ridiculous. The tip increases with the item cost increasing, padding the % is just superfluous. >


You do any service on a car? That's a tip

That isn't a thing.

You want to get tour car hand washed? That's a tip.

It is? Detailing is a service at my local car wash and I've never been asked for a tip.
Edit: Does dining out in the US cost more (including the 18% tip) than dining out in Europe? >

I feel like most of these tipping-alarmist posts are written by people who somehow think you have to tip in way more places than you actually do.