A writer on Slate decided to have a little fun with hyperdependence upon dashes in writing. I recommend the read.
My own besetting literary sin is the semicolon, though my guilt in the dash sector is more than it should be. I’ve learned that, the longer it takes to edit a paragraph for clarity and flow–the more you have to move stuff around to remove this dash or that semicolon–the stronger your signal to rewrite it afresh.
If you fooled with it for fifteen minutes, you already wasted more time rewriting it than you spent writing it. It’s fourth down; if you aren’t past midfield, punt.