The fitter who trained me was very wise. You are not allowed to "freak out" over choices made by your client - unless those choices are causing the client problems.

So, if my client comes in riding centuries on a hard plastic BMX saddle with no complaints that can be traced to that saddle, I am not to throw a fit and demand the client change saddles.

If a client comes in wearing his favorite Utilikilt (in the traditional manner) that he says he wears for all his rides, and has no issues with his hee-hah; I am not to throw a fit and demand he start wearing cycling shorts.

"If it ain't broke, don't fix it."

(take your fitter's freak-outs with a grain of salt)