I carried for over 20 years in law enforcement and other environments, and have carried concealed for over 15 years. So again, I have a fair amount of real world experience. I imagine there are folks here who have more experience than I.
I find it hard to believe that none of your guns show holster wear if they're "in and out of the holster constantly." Be that as it may, it is what it is.
And yes, obviously, we each have our own opinion as to how holster wear occurs and the cures for it.
I'll refrain from further comment on this subject. Best of luck to those here in their endeavors to learn the how's and why's of making holsters.