Background CGI for ensuring consistency and immersion is what CGI excels at. Human-based CGI still has the uncanny valley. I loved Furiosa, but you can easily tell when they had CGI humans for stunts.
It's just another tool and directors need to choose the appropriate time to use it and when not to.
They think they own most of the guns because they've built a whole culture around it. What they don't realize is there are plenty of non-Rs who own guns too as a hobby or protection, but their whole identity isn't "I'm a gun owner" so they don't go around hoopin' and hollarin' that they own guns.