Scales are my way of teaching my students to get their eyes off of the page. Too many classical musicians play in a bubble. They are not comfortable with composing off the cuff. But they all were "forced" to learn scales but us jazzers and rockers thrive in this. I tell them ( my students ), well now you know the G bebop scale ( yes, it does exist ). Now tell my Johnny, how will you use it? How will you use the D minor blues scale. You can't just learn it for nothing. Put it to use not as a scale but as a melodic line.Compose- make something up. You are allowed, you know. I attended a jazz improve class last year and the musicians who experienced classical music exclusively acted like they were falling into the grand canyon. I wanted to say "Dude, relax". What they wanted was to be told what to play. They couldn't reach a level of "cool" because they were too busy hunting for that right , perfect note. They didn't want to use their ears despite the fact that they studied ear training in their legit music classes. I love it when my "band" buddies ask me to jam with them . I just ask what key it's in and I am good to go. NOW, that being said they do not havee to tell me what key something is in...I can figure it out by using the 2 knobs on the side of my head. Either way, they are very impressed with that ability.Frankly, I love the ability to be able to play classical, jazz, rock etc and the one link to all of these are scales...plus a bit of the "cool". 
