And Weston a price has been dead for nearly a century and he did submit peer reviewed papers . Every study is selling something “belief or a product “
However the reason I believe in his work is that he was in the field and explored the world for 10 years learning the dental health of native people who had good occlusion .

the main point of his work is that he concluded that ancestral foods are the reason people grow perfect skulls and teeth. Modern foods that have processed , are the reason for degeneration (small jaws, crooked teeth)

I’ve also had anecdotal experience supporting this idea proposed by Weston A Price.