Comment by throwawash

And why pray tell, should I disregard cancer specialists at Sloan Kettering telling this guy's entire family not to use mouthwash?

Many available common mouthwash still contain alcohol. Alcohol's causal effect on oral cancer is rarely disputed in medical circles.

If ample clinical studies are absent, science does in fact rely on reason time to time in the interim.

[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6982979/