Process vs. Product

I'm not sure I agree with Murray's theory that we can only learn the writing process by doing it. I've learned a great deal about writing by discussing well known pieces. If we study only the process without envisioning the final product, the process cannot be successful. For me the most effective way to learn the process is by understanding what makes a product effective. If I understand the use of literary devices and the author's appeal to the audience, then I have a good understanding of what I can do to write a good piece.

Questions to consider:

A) What does your personal pre-writing phase consist of? How has is changed as you've matured as a writer?
B) Do you agree with Murray's claim that we can only learn the process by doing it instead of talking about it?
C) Do you find that many of your writing classes are focused on product or process?
D) Is studying successful pieces of writing an effective way of teaching since essentially, you're only studying the product instead of the process?