I don’t place much emphasis on the ring, my own son was given a ring by his grandparents when he graduated and he wore it on his left ring finger. I had seen the speculation previously but cannot access the article you link because it freezes up my computer. There is another site with the same write up which is more friendly to my computer.
Works for me. Sometimes I run across things that I have my doubts about, this was one of them. I always like a second opinion.