Is this comic confusing? It can be hard for me to tell sometimes, what with me writing it, but I'm getting a "this could confuse people" vibe from it. After over a decade, I should probably trust that.
In any case, Susan would like to be able to move her hair around with her mind, keeping it from getting in the way and whatnot. Granted, she does have badass hair blowing in the wind when there is no wind going for her, but that's not entirely convenient and may or may not be artistic license anyway.
That said, I like her poses in this comic, I'm jealous of how many pillows she has, and as someone who up until recently was growing their hair out, I get where she's coming from.