Just because you specifically have not seem videos of people leaning and shooting from cover and concealment with a rifle does no not mean it doesn't happen, and has a matter of a fact being able to do so increases your survivability in a gun fight, it is absolutely necessary and is taught to those who carry a gun professionally, IE military and law enforcement.
Lol It's still leaning, if you body is behind cover while you aim outside of it, it is leaning out of cover, wether It's with a pistol, rifle or, shotgun it doesn't matter.
You're speaking of cutting or pieing or corn wich is related to leaning from cover or concealment but it isn't the same thing. I don't understand why you keep saying that you cannot do this with a rifle, when you certainly can , the video and pictures displayed it perfectly, have you ever shot one? Have you ever had training on a rifle platform? Do you have a law enforcement or military background? It's completely fine if you don't know what you're talking about dude, as long as you don't as if you do.
No moving while prone and ADS sucks so, so, so, so, so, so, so much. Especially since it's so easy to prone on uneven terrain and for the game to freak out and constantly move around your aim until you adjust just enough to settle down.
It feels genuinely awful, why on earth can't our specialists and their special skills just scoot a few feet to the side while staring down the scope of a gun on their stomachs? Movement in general is kinda "meh", going back to play BFV with crouch sprinting and other mobility tools just feels so much better.
Here is another perfect example of leaning and shooting from cover, so that you're body isn't exposed.
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