That's the simple version of it yes. I outlined a more complex version of it in a parallel answer. In short: lacking a complete specification of what to do, it's often impossible even within software teams to tell whether something is a bug.

And you never have a complete specification of what to do.

>an argument from the end user’s perspective

Well, the end user's perspective is buggy.

And a developer doesn't have to give the same semantics as the user, anymore than a medical equipment manufactured needs to consider its products based on what each random patient wants and what misconceptions or urban legends they believe.