It is a regulation used in Alaska to allow hunters to still hunt and not go to a draw; BC incorporated it at first as a 2/3 rule and the bulls we used to let walk because of the 2 point brows drove us nuts; Big bulls. But we still killed moose. Then they brought in the 10 point to allow more success.
It has nothing to do with genetics as half a calf moose's genes comes from the cow and there is no cow season up here for licensed hunters. Genetics are not a worry. We see lots of younger bulls every year (5x5 to 9x9) and a few legal ones to keep things interesting and fun! The old days of moose hunting are long gone and we have to accept the 2/3/10 rule for the Peace.
With the wolf control working, the moose are stable.
But sadly, rumor has it that a certain group is pushing for more areas to be closed for the rut, no more early season and going to LEH. Less areas to hunt, going to draw and closing areas from Oct 1-15 for rifle will result in no benefit to resident hunters of BC or moose.
Cheers
SS