That – would explain a lot. IMO!
How many horse people have we heard say “horses make more sense than people” or words to that effect? It seems almost a prerequisite for horsey-ness. Could it be that many horse people find that humans social cues are easy to miss?
Another thing that JUST IMO from observation is that in the jumping disciplines there is much more ADD than the general population, or whatever is the latest favorite diagnosis for a mind that rapidly switches to a new stimulus while abandoning the last thought. Comes across as ‘distractability’, but in some ways is a behavior for people who have intense focus on what is happening right now over any larger context. Mentally switches gears rapidly to follow the flow of events.
I will really go out on a limb and say that upper-level eventers frequently seem to display this. I have not met all of them by any means. Just noticed it in the ones I’ve met who are keen. One can get their attention for a max of about 20 seconds. After that they are lost to something else that is just now happening, and don’t even remember that someone was talking to them.
Their horses seem have the same rapid shift of focus! I think that the whole point of eventing is that, on course, the rider quickly switches gears to fix any situation, and ride on. That’s what eventing is. A little horse & rider ADD may help!