When I buy a new bicycle I get a thorough fitting is the LBS had someone competent, after that it is up to me, as my body and abilities change, to make the necessary changes in a fit. I have bought bicycles used and done my own fitting that worked well for me.As the others said above, I have learned how to make a bicycle work well for my eccentricities. What each individual does is their own choice, more power to us all.

Bill