Even for gaming, I'd still get the AMD chip since it's at the start of its lifespan, where the Intel chips are at the very end of theirs. . So people still buying the Intel chips are basically paying for a few benchmark numbers...
Your mostly correct, but however I would like to mention a few things:
A) There is a huge dropoff with AMD CPU's in multiplayer games with 64 players, and it was in multiple titles. This is a huge deal for gamers. Someone posted some bench's from Battlefield, I'll see if I can dig them up.
B) While I mostly agree with you about most of those benchmarks being for bragging rights, those of us like myself who play at 1440p/144Hz will benefit from having another 10-20FPS, and if you compared 35 games, you would get the same results as Techspot just did with only more examples of each, so a few more games would run 10-20 FPS faster, a few 5-10FPS faster and a few with no difference.
One could also argue that Ryzen has been out enough and has mostly matured, and some of those Intel Chips like the 9700K can overclock to 5.2GHz - 5.4GHz, picking up another 3-8FPS in some games, while your pretty much maxed with Ryzen. It all comes down to price range, if I was building a budget gaming PC, the Ryzen 3600 is a stud. But if I was spending around $300, I'd get Intel and overclock it.
It will be years before gaming results truly change, and use more then 8 cores, as the new consoles (PS5/Xbox Scarlett) are rumored to have 8/16 core processors, that's what most developers will be shooting for. Nothing wrong with being future proof either but at the same time, when will folks who only care to game actually need more then 8 cores? Not now, that's for sure, and this is with newer titles.