https://store.steampowered.com/app/730/CounterStrike_Global_...
I am hard-pressed to say that it looks like a suitable benchmark. It's hard to find a desktop CPU released in the past five years that can't provide good performance for a game like that.
Intel always had a huge lead on CS:GO until Zen 2 where the gap finally closes up, which is why a lot of people is referring to CS:GO benchmark when talking about Zen 2 in context of gaming.
It's usually easier to get to that point on older games. How this benchmark maps to real-world experience is, of course, a different matter.
So from my reading this "elite/full time" gamers will still buy an expensive CPU if they get 10 extra frames (but forget that in real life your PC has more programs running in background so reality may not match the benchmarks)
The real reason is, I only really play csgo and pubg, I have X$ to spend on a CPU. Previously if you looked at them market, tier-to-tier amd vs intel - intel always was the stronger performer at the CSGO. Why spend X$ and get 250fps when you can spend the same and get 300fps?
When I first bought my main laptop in 2017, I could play somewhat smoothly at 1080p, now I have to use 720p.
It's an interesting side-effect, before Steam and other content-platforms, games titles iterated much faster.
EDIT: Then again, when I think about CoD, I'll retract my last sentence.