Curious why you feel its absurd people need to be told this? Even in the the study you linked, they note in the discussion
It is of great surprise to find that detection of fecal bacteria was prejudiced against the bidet toilet users.
Still a concerning study to me, since I’m a habitual bidet user. Fortunately I don’t need to worry about vaginal microflora. Furthermore, I could only find this one small study that shows correlation (not necessarily causation), so I’d be hesitant to immediately regard bidets as less sanitary than wiping, especially for men.