I think one of the biggest problems facing wildlife managers is dealing with the public. In states that have a long history of hunting,, are rural, and folks are gun-savy, saying "any center-fre rifle" ( or handgun, if allowed ) is probably fine; people know what works and what doesn't.
But, ask anyone who has worked at a range during "sight-in" just before hunting season, or anyone who has worked at a gun shop, there are an unfortunate number of "newbies", perhaps well-intentioned, that do not have a clue. Sure, in GOOD HANDS, a .22 will kill most anything, but how many maimed animals run off with broken jaws, wounds that will infect and kill slowly, etc, done by poachers? Ditto for sub-standard calibers in rookie hands. There are only so many harvestible animals out there, and the game regs are trying to insure clean kills. It's a tough balance. I'm sure most all who come on GBO are well above average in knowledge and ability, but the regs are for the public in general, too many of which are not.
Just a a thought.
Mark