Very refreshing to see this take and I largely agree. People all too often refer to linters as The Rule rather than The Tool, and forget that a robot will never be able to evaluate the quality of a codebase. That requires human input (though Rubocop is very efficient for people that want to avoid human input--often the root cause of the problem).

That said, I am a fan of single-use private methods and think they have their place, with or without method-length rules.