Scales are cool, because they have weird names and you can say 'dude, I played this chromatic lick that ended on the minor second of the root of the progression' instead of 'I ****ed up the end of the solo...'
Anyways, scales are great to understand chords and the overall relationships of tunes (harmony). But never let them get in your way (don't play a scale just to name the tune after it... like 'the enigmatic' for example... what? someone has done it already? come on... are you serious? naaaah...)