Streamers are a small subset of the user base to begin with, and an even smaller subset uses capture cards on consoles. It's only the professional ones that use them on consoles.
The cheat isn't fully external. It sends input to the controller. Also, the player still has to aim in the direction of the enemy for it to work. The closed nature of consoles will most certainly help
The in-development cheat, brought to light by the Anti-Cheat Police Department Twitter account this week, claims to use machine learning to analyse gameplay footage in real-time before sending inputs to your controller.
This is not an aim bot or wallhack in the traditional sense. This new cheat can only react to what is shown on-screen, and the user must aim in the general direction of the enemy in order to benefit.
There's also the question of how much latency this would add to input. Is it even worth the hassle of plugging the console to a capture card and PC, not to mention the cost involved?
As it stands, it's largely inaccessible for a console audience that's unlikely to have a PC and capture card to hand (not to mention any input delay this would cause).
What's funny, though, is that even with this AI driven technique, the traditional aimbot on PC is still much, much superior
In Warzone, for example, typical aim bots see the cheater "snap" to targets hundreds of meters away, even those hidden behind cover or in the gas and therefore invisible to the naked eye.
Also:
www.gamespot.com
