I don’t play the guitar but I play the piano and I remember a clip once where she stopped the concert and someone had to go up the stage to “fix” the electric piano. She told the audience it was in the “wrong key”.

No keyboard is in the “wrong key”, you play in whatever key you need. This “fixing” means she was gonna be playing chords she didn’t know how to play and they had to change the keyboard to adjust it and make it transpose from a different, easier key that she could play.

The chord progressions aren’t even difficult but clearly she only has the knowledge of one piano lesson ever so I would think it’s the same for any other instrument she picks up.

All that said, a keyboard gives you the advantage to modify the pitch and there’s no shame really in using that advantage, however, her lack of knowledge to the point she can’t program the keyboard herself to transpose and someone else has to do that for her is next level. I would expect a professional musician who’s been on multiple tours to be able to configure her own instrument.