I mean this jokingly , but sounds to me like the DUMB part here isn't the deer, as there honestly being SMART< there eating prime food NOW< when its safe to do so, making them in better shape come fall and or while raising there of spring
the DUMB< part might be when a person plants good food and doesn;t expect it to get hammered when there are a LOT of deer and other things that will move in on a prime food source when its EASY food at the same time LOL
But honestly I feel your pain, I have TRIED to plant many things on properties over the yrs that had super high deer density number, nd was amazed and chocked at how fast they can destroy a food plot, it really taught me the use of E fencing and other things to TRY and curb the fast devouring of things
on the bright side, some of these properties , saved me a lot of time mowing and or spraying things, as they ate clover so fast , it never had to be mowed
and many other things would be GONE, before need to treat for weeds LOL
sadly, I also learned that no matter HOW many deer I could kill off some of the places, it was a loosing battle and I gave up and moved onto other places, the costs trying were just now worth it in the end!
its amazing how many deer some places will hold
the one farm I managed, was nothing to see a 100+ deer in a field at a time, and add in a few different sections of the farm, would have even more deer on at same time
when I was younger I would have never though there was such a thing as too many deer on a hunting property, now I know its maybe worse than NOT having many at all!