This is simply not true.There are highly-used and highly-usable formatters for Python, Elm, Haskell, F♯, etc., all of which are whitespace-sensitive/indentation

This is simply not true.There are highly-used and highly-usable formatters for Python, Elm, Haskell, F♯, etc., all of which are whitespace-sensitive/indentation-dependent languages. "Adjusting indentation" is far from the only thing formatters do, and even things like breaking or wrapping expressions over multiple lines can certainly be done in all of these languages.