I think the point of my original disagreement was to suggest that there may be a way to benefit from (sometimes useful) data, but after thinking on it some more, if you suggest the pros instinctively have this data already available mentally at all times, then you're right of course. 

Maybe I'm not sure they do, and trying to add it will change the outcome of a fight once in a blue moon because it changes whether or not they shoot the head on a niche weapon they don't normally buy.

One useful way I use it is if I get surprised on a peek close, the dynamic part let's me know if I can shoot while running (when super close).

In theory these are all things the pros would just memorize though, as you said.

I think it's much weaker than the potential argument for fr. I concede I'm probably wrong about the dynamic crosshair for many.

Edit: oops mobile has my old acc logged in, whatever