No, I didn’t miss his point. Assuming you have sufficient winter forage, there is no downside to having more deer. Unless the bucks who survive hunting season are starving to death during the winter, there is no advantage to having fewer deer. The does aren’t going to run off the bucks.
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“Keep on keepin’ on…”
There are a few downsides I can think of.
First, an abundance of winter forage doesn't last forever. An unhunted doe population will eventually lead to a food shortage /nutritional quality issue in most habitats.
Second, year-round nutrition takes a hit, as does and their fawns dominate the best feed, and bucks are naturally dispersed from them and that area through most of the year.
Too many deer hurts bio-diversity and "the health of the woods" well before deer start keeling over from starvation (or diseases linked to over-population). Think over-browsing, damage to the understory, lack of feed, nesting and security cover for other species, etc.
If bucks are taking the brunt of the hunting pressure (and they usually are) a deliberate policy of taking no does ON TOP OF THAT leads to sex ratio and age structure problems in addition to the above.
Fewer does and a conservative buck harvest also translates to a more intense and condensed rut, which is generally good for buck hunting and everyone's fung schway ---LOL
I could go on or into more detail, but most whitetail habitats benefit from a significant effort to take does. Areas which protected does 20 years ago have changed enough that a doe hunt is encouraged now.
I would love to hear what the deer biologists in your area have to say about all this, if you have the time to contact them.