Not that I'm against it, but maybe other considerations are included like the problem with just a visual oral screening in that the oropharynx is not totally visible, accessible, and BOT cancer can be deeper in the structure, and have no visible cancer signs on the surface.
HPV almost always involves the oropharynx, which is on the rise, and usually doesn't present with any leukoplakia or eruthroplakia either, so a clear oral exam may mis oropharynx cancer. Most oropharynx cancers are usually found in advanced stages, usually from an enlarged lymph node, as in my case, and two ENT's could not find any cancer by a visual, palpable and flex scope exam, but sent me for further testing. Other countries have mandatory oral cancer screenings like India, Cuba, I believe, which did not lower the cancer rates due to follow up, and other reasons. I guess better screening, new testing, follow-uo, vaccination, and education may help too.