Sounds to me like Male Answer Syndrome, orated by presumably male doctor(s) who haven't ridden a bicycle since, maybe, the summer after their first year in med school. How many of these expert M.D.s have ridden a bike in, say, 80 F in the last 10 years?
Not to mention the cure-all of "eliminate overweight." Somebody stuff a twinkie in that expert's mouth, fast!