Unless you are using an adjustable stock with build in cheek riser, shooting NTCH is one of the only ways to get a repeatable cheek weld for accurate long range shots with an AR. Due to the fundamental differences between and AR and bolt gun, it is one less variable that makes it easy to focus on your hold and follow through.
Now, am I shooting NTCH when shooting heads up and moving? No, its not needed as speed and violence of action is magnitudes more important than insignificant accuracy difference at those ranges.
Using the Manual of arms, there is no benefit to an Ambi Charging handle. It looks cool but unless you are a lefty, its really does not offer much.
Maybe the argument can be made on a large frame AR, it will give more scope clearance but then you are probably talking about an adjustable stock as well. That's where an extended latch comes into play.
Maybe you could make an argument for weak side shooting and offhand manipulation, but I don't think the juice is worth the squeeze.
Companies invent shit and people buy them. Most shooters are like people ricing out a honda. Its more important that it looks cool than is functional. Most of the shit people throw on their gun falls into that category. Useless shit to look cool. And they inadvertently make their gun less reliable and introduce additional failure vectors (Not a CH but the other bullshit like BAD levers,ect)
There is a difference between refining knowledge and being able to articulate why something is a good or bad idea.