Marty,

There is a genetic potential here. Some have unusually high finger dexterity. Doc, Norman et. al. and in jazz, there are many as well.
The question is can you play in the spirit of Doc? I think to some degree you can but the most important thing is that when you go after the sound you like, you'll find yourself and your own way of playing. Remember that Doc started out playing in ensembles. Clarence Ashley was the band that first brought him attention to the folkies in the New York area. He had been playing in many bands prior to that. He had assimilated his brand of country music over the long haul.

Here's the bottom line....Doc is an inspiration to all of us but the best thing you can do is to become the best musician you can by not just playing technically well but to interact with other musicians and support them as they support you. Doc is not just a machine but a fine interpreter of his music which emanates from a rural tradition of playing. Find your own tradition and your own way and beware of teachers that try to lay a trip on you.

Frank