You're reading an article by a prominent site for gamers, not professionals. Even though hardly anybody will buy a Threadripper Pro for gaming, Tom's is writing

You're reading an article by a prominent site for gamers, not professionals. Even though hardly anybody will buy a Threadripper Pro for gaming, Tom's is writing what their readers want to see. They themselves say they know it is not intended for gaming, but they "couldn't resist" showing those metrics. I bet that is what most of their readers are wanting to see too.