That's what the author is saying though. The classification of "bug vs. feature" is irrelevant to the user, and trying to convince someone to call it something

That's what the author is saying though. The classification of "bug vs. feature" is irrelevant to the user, and trying to convince someone to call it something other than a bug to make the developer feel better is missing the point. What matters is something isn't working for the user, and should be made to work.