Look here is the reality with Katir - in a 3 year stretch from 2018-2020 he ran 3.40, 3.37 and 3.36 - ages 20,21,22. He then dropped 8 seconds in a season to 3.28. That's not the same 8 seconds dropping from 3.50 to 3.42 or even 3.44 to a borderline world class 3.36 - that's 8 seconds into rare air that guys like Coe, Willis, Cram, even Daniel Komen never got into.
And I understand the rebuttal here - "well he was still young - only 22, so he was just maturing and it's not that crazy to comprehend" but it kind of is. To have the requisite talent to run this fast, it's usually becoming evident at an earlier age. Case in point Jakob who right now is only 4 tenths of a second faster than Katir lifetime, ran 3.31 at 17, 3.30 at 18, 3.28 at 19. Willis ran 3.36 at age 20 (same as Katir), 3.32 at 21 and then had to grind out almost 10 years of low 3.30 running every season until he finally broke through the barrier. Coe followed a similar pattern having run 3.32 at age 22 and had to wait 7 years of obviously quality performances before he broke the 3.30 barrier.
So this progression of Katir isn't normal and is more in line with a guy like Rashid Ramzi who went from running 3.39 to 3.30 in a season - funnily enough from the age of 22 to 23, exactly the same ages that Katir experienced his seismic jump. I guess we don't need any briefing on how Ramiz achieved that do we?
Throw into the mix that this jump happened during a period of time where we know for a fact that athlete isolation was at an all-time high because the world thought humanity was coming to an end, and there is a lot of anecdotal and circumstantial evidence that points to a high level of suspicion.
Also the way the human mind processes and rationalizes past actions is very complex. Maybe Katir right now is clean as a whistle. Maybe he has been for the past 2 seasons? Maybe that's enough in his mind to be able to claim he's clean and everyone else can go f--- themselves, I don't know.
I personally find his jump/rise to prominence hard to believe but that's just me and I could be wrong. Either way I find him just as believable as many others out there so good for him I guess.