I was thinking about this again last night and I can actually sort of grasp a little bit why it perhaps wouldn't be a great idea to go over.As I said, my views are subjective and anecdotal. Select examples stemming from exceptionalism don’t change that.
My original comment was in this particular circumstance, it looks amateurish for a referee to be speaking side by side with an AR. I have only seen elite coaches question this sort of action and never endorse it.
Imagined this conversation then gets replayed on Mic'd up, you can imagine what the general public would say!
AR: I've got Bernado Silva in an offside position, do you think he's in the line of sight?
CK: He's stood in front of the keeper as the header comes in, for me he possibly is
AR: That's offside for me then, happy for me to signal?
CK: Hold on a minute, I'm gonna come over and chat to you to sell it
...
...
...
CK: Bernado Silva was in the line of sight of the keeper from the header, happy to award offside?
AR: Yes confirmed.
*AR Raises Flag*
OK it might not go down exactly like that, but it probably would look a bit odd played back.