If you want to live in the US, then assimilate. Either do it or dont -- but please stop this pedantic "how-the-rest-of-the-world" works perspective.
I'm sorry, you'd have to live with hearing different perspectives. I'll be visiting the US in a bit, I'll decide to tip or not and I'll still give my opinion. :)
Or you could take your own advice and avoid any place (on or off line) that will expose you to international perspectives.
Your opinion is always welcome even if I disagree with it.
Enjoy your stay :-)
The were many instance where I would have liked to tip an especially nice Uber driver as an extraordinary thing. But due to the poisonous tipping culture this is not easily available through the app and giving cache is another hurdle and inconvenient for both parties.
America has this huge ego, where some of you guys feel "the best". It's a third world country, seriously. Don't like how you roll and won't come back, once was enough.
It's your problem, so maybe try relaxing and listen to advice if it's sensible.