Take a look at the question: "What is a "humanizer"? Why is it different from an aimbot?"
In further regards to your question:
An aimbot aims for you. The humanizer assists your aim.
Moonlight's humanizer is an upgrade from Astrogalaxy's humanizer. It is less mechanical and is dependent on more conditions.
Take a look at this GIF:
An
aimbot (which aims for you), will not have such a thing happen in the above GIF. Rather, an aimbot will directly aim to the target and perform the regular
smoothing,
fov check, and so forth. I'm sure you are familiar with this type of feature. Commonly referred to as a "legitbot" or a simple "aimbot".
Take a look at this GIF now:
The
humanizer (assists your aim), as seen in the GIF above is
complimenting the player's current shooting/aiming situation. It's not aiming at a player for you. Instead, it's compensating for your situation so your aim looks organic.
There are many different logic conditions that are executed for the humanizer to perform how it does. It knows when to be responsive, when to assist you, when to compensate over frame and network conditions and so forth. The humanizer is taught to know when you're actually trying to shoot at somebody and it will assist you accordingly.
Both GIFs are from the humanizer found in fantasy.moonlight. As you can see, the humanizer will not reward you or respond for AFK/Lazy shooting. It will not respond if it knows you're not even trying to put any effort into your aiming. It will only respond when it knows you need assistance, not something to do the work for you.
This is why people have said countless times that fantasy.cat's humanizer has "improved their aim" or "made them better at the game". As an analogy, it's like somebody spotting you at the gym and giving you some leverage as you're trying to lift heavy weights. You're still building muscle and getting stronger, but you have some assistance by your side as you do it. An aimbot/legitbot is like somebody telling you to lift heavy weights, then lifting it for you even though you did nothing.
Remember that fantasy.cat is a place for serious closet cheaters only (boosters, streamers, etc), not those looking for a legit-cheating solution. Therefore features are designed and developed according to the intention and goal of fantasy.cat (closet cheating solution).
As I said, fantasy.moonlight or just Moonlight, the humanizer is a direct upgrade and has been completely rewritten from Astrogalaxy. Astrogalaxy's humanizer had a lot of "aimbot" features. It did a lot of work for you. It felt like a legitbot with an AI attached; but missing some final touches. It was half the potential of what the humanizer could have really been. That's why it's referred to as the "Humanizer Aimbot".
Moonlight has the humanizer at its highest potential right now, despite being in beta stages. It is also customizable with Lua scripts.
With this all being said, I hope this detailed answer gives you all the information you need. I have not included all information about the humanizer in this post due to the length and privacy reasons.