Why a relative replaced some perfectly good Michelin Tires?

I've been running Bfg's for many years now. Have have great luck with them. Some people love em others hate em I've been fine with them. Now my next set may try Cooper tires. Not sure we'll see!
FWIW.... BFG has been owned by owned by Michelin for at least 10 years.

Cooper is in Findlay OH. They are mid-pack tires, IMHO. Looong ago, I rallied on their old bias-ply Weathermasters however.... we called them 'rock crushers' LOL