““Virtuoso” is used promiscuously, without much thought for the actual thing it is describing.
Here’s an example: Lang Lang is considered a virtuosic pianist. He plays at fast tempos and does so with a lot of demonstrative physical flourishes. He also has terrible technique, constantly fudging passages and in the times I’ve seen him unable to maintain a consistent pulse or tempo. I’ve also never heard any ideas from him, so his ability to play the piano and think about music are both questionable to me. There’s nothing I see in him that’s virtuosic, other than perhaps public presentation.
Then there are musicians like Oscar Peterson, or Jascha Heifetz, or Al Di Meola, who can play the hell out of their instrument but, to my ear and heart, do nothing more than spin out polished notes—they have nothing to say. Admiring their technique only goes so far.”