how are you doubting any player can cheat on lan?
It's a fact, you got money you can cheat on majors without even 1% of being caught ( by admins ofc) and pull out s1mple every game.
There is nothing to doubt about, anyone who has money, can cheat on lans, can win majors, can be the next ZywOo, s1mple.
Thats fact. How many of the pro players use cheats? Not sure, but for sure few of them, just bcs if coders are selling cheats like this for such an amount of money, someone buys this cheats.
And if you buy that kind of a cheat, what's the problem to become the next CSGO star player?
IF you actually read the information and evidence including screenshots, you would have known it already.