My opinion only and based on my long term observations/reasoning:Agreed. I just wonder why some days they're obsessed with a scrape, messing with it for 5-6 minutes straight. And other days, they just walk right through it like it's not there.
When obsessed/crazy scrapping they are either mad or desperate, all based on competition. If dominant and secure, then they don't have to work it so hard. If a lessor or interloper shows up (known or unknown) they are mad and making clear they want to/will fight. If there are equals or potential superiors or worse just too many competitors, they are overwhelmed/desperate.
Heck, if you've ever been in a bar, you've seen it in the behavior of supposedly higher intelligence males.
What scares me is the young bucks in your chart this year. Why are they not afraid of getting creamed???