In Scotland formal training has damaged, in my opinion, the ability to impart "blas"* into the music. In Cape Breton or Ireland the exact same tune may be played but it sounds much different and much more lively even when played at the same tempo. Written music is great for learning tunes but then the sheets should be thrown in the fire and the ear should rule. To try and play of a sheet is to clone everyone else, needed for an orchestra but terrible for folk music.
* BLAS Gaelic for warmth/feeling/individual expression.