It may be the 'correct term', but this is 2020 after all, and if @Timbeck2 identifies with the wit of a rapist, aren't we supposed to just accept that?
Nothing confusing about it.
Once you obtain your Private Pilot Certificate, you're no longer a Student Pilot. You're a rated Pilot.
When you go for an additional rating, you're a rated pilot, working on additional ratings.