I have my drivers license and can drive in circles for days.....Doesn't mean that I'm ready to drive in a nascar race though.
What's considered a good route in college doesn't mean it's a good route in the pros. It's simply a different level of play with a lower margin of error. These guys can all run routes, but with each step into a higher league those routes need to be cleaner, crisper, quicker. A college coach for the most part is going to coach his guy up well enough to make plays on Saturday. They want to help get these guys into the NFL, but i'm not sure their main focus is getting them NFL ready.