The fact that Dart's formatter FAQ tells developers who are unhappy with the output to change their code to satisfy the formatter (https://github.com/dart-lang/dart_style/wiki/FAQ#i-dont-like...), rather than allowing developers to tweak the formatter to satisfy their code, is such a huge tell about their mindset. And again, these global styles do not "end the discussion" as people in this thread have asserted. The "tall style" PR (https://github.com/dart-lang/dart_style/issues/1253) refutes that. And that PR has since devolved into bickering and heated demands since its adoption into SDK 3.7.0, since it transforms people's code in ways they dislike and/or find less readable.
Just let people, projects, and organisations enforce their own styles conventions. It's not hard and it shouldn't be controversial.