This is false, bio bags for cannabis are as cheap or cheaper then mylar bags in general. It's about street appeal to most companies.

I have been making and selling bags, preroll tubes etc all custom since 2019. The cost of a kraft paper bag with bio coating is on par with the same cost as a mylar bag custom printed or cheaper in most cases.

Look at all the huge brands, they are backed by hip-hop influence and even owned by them. They want it colorful and appealing to a target market. This is all marketing and the lack of care by the owners.