Read the article and explain how some grocer or any other guy burying his wife with her jewelry has anything to do with this revelation of centuries of this practice from the catholic church.
I thought I did, but I'm willing to try again.
1) Many people (possibly including you) believe that it is morally permissible for a man to bury his wife's corpse, which is adorned with a gold necklace, rings, and ear-rings. Certainly, Catholics see this as morally permissible.
2) Some Christians in the 15th century adorned the corpses of people who they presumed to be saints, with jewelry. You believe this practice to be wrong. Catholics believe this to be morally permissible.
3) I have a hard time seeing a difference in principle. Apparently, you see a contradiction somewhere.