What early 2000's webcomics taught me is there were a lot of really great writers out there with some subpar art skills.
When the writing is so good, you don't give a shit that it's all stick figures.
EDIT: I almost forgot. With some of them, the best part was watching them go from stick figures to genuinely great art. Penny Arcade is a great example. The originals were so badly drawn, and it went from bad art to an artist literally having a style all their own.