Wasn't Joan Jett main appeal, is that she didn't conform to the dolly-bird, girly persona. Therefore, she was praised just for being different.
I didn't see "different" listed anywhere beside her name. She didn't try to look or act like a male (look at the Cherry Bomb video posted above). She is a guitarist, a damn good guitarist, a pioneer, and a woman. I think she is recognized for her skills.
You asked why women dont take that bohemian attitude to the guitar. Take a look at The Great Kat. She is a bohemian monster on the guitar. She takes complex classical pieces and turns them into thrash masterpieces. Her skill is recognized (she is listed in the top 10 fastest guitarists) and has been compared to Yngwie J. Malmsteen.
Flight of the Bumblebee
Beethoven Mosh 5th Symphony