Because smoothies are by definition and common belief the healthiest thing you can ingest before, during and after exercise. Smoothies are so healthy that are sold in health food stores. If that isn't proof, I don't know what is.
Scrape the filling off the crust, place filling in blender, discard the evil crust. Add 1 medium banana, preferably frozen. Then add:
Blend until it looks like a smoothie. Or a smoovie if you never studied phonics. Drink to your health!
Pro tip: This recipe is easily adaptable to apple pie and other fruit pies. It won't be quite as successful with pecan pie, kidney pie, shepard's pie, cheesecake and that awful fake pie thing made with Cool Whip and crushed Oreos.