allow them to keep parts of their culture that has nothing to do with commerce,

You mean like special hunting privileges?

I have witnessed a group of Native hunters pull up in a refrigerated 18-wheeler, unload a bunch of atv’s and ride around picking off out of season deer with high powered semi-auto rifles. They loaded up dozens of deer into the reefer unit and rumour is the keep the back straps for themselves and sell the rest of the meat.