I just don't get it

How does Dolly Parton play the guitar with those super-long fingernails? If you watch her, you can see that she's really playing, not just moving her hands around like they do sometimes on TV. But if I had fingernails like that and I tried to play, I wouldn't be able to get the fingers in the right position to make the notes sound right. Maybe her playing-with-long-fingernail talent is one explanation for why she has been so popular for so long.