Here's a hill I'll die on: "#Pythonic" is a meaningless word.
People will use it to justify any, and sometimes incompatible formatting preferences.
"Idiomatic #Python" should be what it stands for, which has nothing to do with formatting. Even then, it sounds much too dogmatic to my taste. Good design doesn't need pseudo justifications like "that's the way we've always done it"; only poor quality code does.