On the internet, no one knows you are a dog.I've worked in a service industry - multiple, actually - but not ones where I got tips. Fast Food, Education, Retail Management (of a music store), and Receptionist. (One of the receptionist gigs was in Mental Health; one was in the National Archives system)
I've NEVER seen a check with a suggested tip. Not once. Not anywhere I've paid for a sit-down meal... Alaska, Oregon, Washington, Florida. The only suggestions have been at the register when paying by card, on the tablet or touchpad.
If you've never seen a check in a restaurant with the suggested tip at the bottom, then you're either blind or you literally don't bother reading the check in your haste to give 5-10%. Most POS systems will print it out now.*
*Seriously- it's everywhere. It was at Chili's 10 years ago before they switched to the touchscreen that ... also has it. Chili's isn't exactly the vanguard either. I can't recall the last time I didn't see it. Denny's ... DENNY'S has suggested tip amounts when you pay now. At a certain point, I don't know what to say when it comes to your personal anecdotes and my knowledge of reality.
Square does allow changing the 3 displayed. Same source, next section, rendered on same screen. Read your sources carefully before implying that someone's a liar based upon them.
As I wrote-
1. Square does not have a default 10% setting. Source. Give that it is not a default setting, and I've never seen it customized to that in the wild, I have to assume you have either a mistaken memory, or a very bizarre and self-selected set of places you visit.
That didn't take careful reading, did it? Next time, just try normal reading!
More importantly, you missed the point- if you are proudly declaring that you tip 5 and 10%, people will judge you for that because it's against societal norms.
It's the same as if you say, "I like to fart loudly in public, and then scream at the top of my lungs, 'SNIFF MY GAS!'"
You can do it, but people will question why you so proudly proclaim it.