Let me guess, you guys are console players? :D
I´ll try to explain.. Even the most sophisticated cheats out there can be spotted from 8-16h gameplay (it goes even faster if you have an admin actively monitoring the person - as you do in LAN tournaments). You basically look at the patterns of how someone is aiming (wrist/elbow) patterns in micro flick / flick and tracking. You also need to know the persons dpi/sens. Now, most Apex streamers (PC) have actually been to LAN tournaments - and cheating there is basically very very hard.
Have there been streamers who cheated - yes. But they eventually got caught. Are the big Apex Streamers cheating - no.
People even claimed that the majority of streamers were cheating when they reduced muzzle flash... ONE streamer used ALT+F4 once after getting killed by an aimbotter and people go bananas (he didnt exploit it like the ones who got banned, those were players that used it more than 10-50 times).
I think these claims show more about your own insecurity than anything else. I can understand that most console players - having no experience in PC gaming can think that they are cheating, since they cant understand anything that goes into aiming with a mouse (what is actually possible - and what stands out). Most of them actually think that micro flick is aimbot...
There is a thing we call "a losers mentality" that is a player who always blames other things for his own failure. Anything in life, its someone else´s fault. They cant be a streamer, because streamers cheat. A winner is someone who studies the best, learns and adapts (they invest time into learning how some have gotten a god aim, and they eventually become really good).
Not saying that we should all be naiv - but try to understand that most of these have invested almost their entire Lifes at games - and they have ALOT to lose, more than you ever will have. So be careful with these accusations when you do not have any proof what so ever...