GSPfan ,
Maybe it doesn't "add value" to you, but it does to other people--which means such a rifle will generally increase in monetary value.
The same is true of custom rifles made by certain gunsmiths.
Some people also do get "pleasure value" from owning a fine rifle even if it was owned by somebody famous.
I will never own a JOC rifle but I do own two rifles once owned by a gentleman named John Barsness. To me they are priceless.