a decades long study with a gazillion of potential confounders is never "either scientifically shown to be beneficial or it isn't"... let alone the precautiona

a decades long study with a gazillion of potential confounders is never "either scientifically shown to be beneficial or it isn't"... let alone the precautionary principle in a complex system with a gazillion variables... (i.e. things we don't know we don't know)