And they also thought the same about cervical cancer way back when. They now know that HPV can lead to anal and penile cancer. Though the efficacy of the vaccines is unknown, some men are getting vaccinated "off-label."
Note that the "cancer vaccines" that they push are actually HPV vaccines, since without the HPV women don't get cervical cancer (other than a very few exceptions). So this vaccine wouldn't help for the throat cancer of Baby Boomers...since they are already infected with the HPV.
And note that nearly half of women who used condoms still caught HPV...and there are many strains. It's easy to get confused between them and their effects--the current vaccines prevent only a few strains.
Note, I am not a doctor. (but I can play one! ;-)