It's an established fact that pulling a tooth will cause jawbone deterioration and also supereruption of the opposing tooth.If spaces are left when teeth are pulled , remaining teeth move and this exacerbates TMJ problems .Ofcourse people who take cortisone as if it was candy don't care much about bone health .
One can pull al lof their teeth and get dentures if they want to avoid the toxins in dental materials but dentures are probably full of toxins .
I don't think that asking a few senior citizens if they are healthy despite missing teeth is very scientific. Do you think TMJ and cavitations don't exist . X-rays of people in their twenties often show extensive damage from TMJ.