Exactly. And it really can't help. And here's the Assatheory why:
There are two "schools" of thought regarding antlers, and I've never heard either proved conclusively.
1. Diet
2. Genetics
Yes, it's possible to say that there is a combination of both, but I discount that, because then you just get a mish-mosh of avergeness, and really no "theory" at all. Because if it's a combination of both, then it goes both ways, and there's no sense even having such a theory which proves nothing, regardless of the outcome.
So, that being said. If it's #1 (diet), then killing 6 points and up means nothing, relating to age, continued health, or anything else. It just means that at the right time during that year, the buck ate well, and had plenty of what he needed. And the last time I checked, antler restrictions don't impact the weather or what grows out of the ground and when. So just because they "allow" shooting what appear to be strong deer, it really may be nothing of the sort, just a good spring crop, and a heavy acorn fall the previous year or some damn thing.
If it's #2 (genetics), then mandating that 6 and up only be killed only hurts the gene pool, by allowing a bunch of shitbagged 4 1/2 year old spindly 4 point bucks to breed, and further propagate the mess. If they TRULY wanted to do "something" for the "trophied" folks, they would prohibit shooting anything OVER, say, 4 points for a few years running. But we all know the effect that would have on hunting, when everybody started raising hell about only being allowed to shoot spikes and such