Do 90% of hunters/fisherman we really need to know much 'bushcraft' to hunt/fish ? .....good question !
I don't think so. Basic 'survival' skills for sure, but very few hunters are ever in scenarios where a 911 can't be surmounted.
Most remote hunting/fishing locations you are in the care of Outfitters for basic needs and emergency scenarios.
If you hunt/fish at established base camps...there really is no different than if your staying at a cabin, off season maybe, but not something that requires special skills.
Not to many guys hunt from a tent camps anymore, but even then it's normally Coleman type camping with carried in supplies, so 'bushcraft is not essential...ie few will need to snare a rabbit for dinner :)
I do however believe that everyone needs to know basic Bushcraft skills, ie; how to hold and use a knife. Those type of things that used to be taught thru Cub/Scout organizations. I don't know if they still do or if kids are even interested in learning those skills.
But then I grew up in a generation when everyone knew how to change the oil and sparks plugs on their truck....LOL..