Why a relative replaced some perfectly good Michelin Tires?

And we all know. Those other 3 "good" tires from that 4 tire set they shamed us into buying were resold. In California you even have to pay a "recycling" fee for the replaced tires. On the other hand, many freight trucks run on recaps. 80K pounds in CA on recaps and they get all nutted up over 4K pound SUV on a patched/plugged tire. Well, I guess lawyers have to work too. Excuse my rant please.