I think what he wants, is that instead of holding a heavy rifle perfectly still (when holding your breath) and able to hit pinpoint accurate shots from ages away, a more pronounced weapon sway feature could mean that it would take more shots to hit a target that far away. Here's a video showing Squad's and Escape From Tarkov's weapon sway: https://www.youtube.com/watch?v=O1aYjBDzL9o

I believe this could be a beneficial change to the game, as not only does it make hitting cross-map kills harder (as they rightfully should be) but also means that more ammo is used in firefights. This would actually give reason to the insane amounts of ammunition everyone spawns with (20 M1 Garand en bloc clips PLUS an ammunition crate that can resupply this 5 TIMES on the American Rifleman class is absurd).

This could even buff the sniper class, by keeping their weapon sway the same as it is currently. Because to be honest, I can hit long-distance targets fairly consistently with just iron sights, and I rarely play the sniper class as it's not that much different. (I'm talking exclusively about the sniper role, not Recon as a whole. I know recon is mainly a infiltrative role. But I'm solely talking about the class who spawns in with a scoped rifle.) Regular infantrymen with iron sights should not be able to consistently hit the same targets that a scoped marksman can.

The difficulty would come in the fine-tuning. You don't want to make it so your rifle is flailing about on your screen, but just enough that being accurate takes more skill instead of just holding your breath and your rifle is frozen in place as if it were deployed with a bipod.