I'm curious what others think, but I'm certain it can't. That's one of the reasons I'm not a fan of MFA writing programs that suggest it can. Sure there are benefits to such programs, but I doubt anyone who wasn't a writer when he started came out one two years later.
It seems to me that creativewriting is like all the arts- mysterious and unavailable to all but a select few who for whatever the reason have been favored by the gods. I base my conclusion on many years of teaching as well as my own experiences as a jazz pianist. While many enjoy my playing and think I'm a talented player, I know better. Try as I may. I'll never approach the level of those musicians who have been born with the gift. Many of them were picking out tunes at at the age of three or four, and what to the rest of us was gained only in small increments or not at all, was to those lucky few second nature.
In both cases it's a matter of hearing things beyond the range of mere mortals; whether notes or words or the rhythm that accompanies great writing and great music alike.Most can listen to Coltrane or Parker (or Faulkner or Carver)and come away uninspired or confused and without the slightest idea how to utilize the genius of those who have preceded them in forming their own unique voice.
It's nice to believe everything is possible if one is willing to put in time and effort. It's also untruthful or worse.