Welcome back to the forum. I'll be happy to put these issues "into perspective" for you.
Your worries about oral HPV and cancer may have been elevated by web searches, in which you found information that, placed in proper context, also should be reassuring. Anxious people tend to be drawn to information that confirms their worries, and to not see or assimilate the reassuring bits. As you learned from Dr. Hook a few weeks ago, HPV infections typically clear up on their own, and that includes the large majority of oral HPV infections.
There is no contradiction between "60% of oropharyngeal cancers were due to HPV" and what we have said on this forum, at least not if you read both sources carefully. Among particular orpharyngeal cancers -- specifically squamous cell cancers of the back of the throat, i.e. in the tonsil area -- it's probably over 60%; probably 80-100% are associated with HPV. Only one type actually is involved, HPV-16. The rate of such cancers has been rising in recent years, but it's currently in the ballpark of 10,000 cases per year in the US. That's a very small number in a population of 320 million, far less frequent than common cancers like breast, cervix, lung, colon, lymphomas, etc.
Millions of people acquire oral HPV infections whether by oral sex or perhaps other routes. A recently published research study showed that at any point in time, 1% of the population has HPV in the throat, i.e. around 3 million people. The vast majority of these, and the vast majority of those not yet infected who will acquire oral HPV-16 in the future, will never get cancer. Finally, many or most of those HPV-16-related cancers each year typically occur in older persons who also have the other risk factors you mention, such as smoking or excessive alcohol intake. Non-smokers and social drinkers will be at even lower risk.
So my advice is that you not worry in the least about oral HPV or its long term health consequences. Doing so would be akin to worrying about being struck by lightning -- which probably is actually a higher risk.
In case you are interested, here are links to two other threads that go into these issues in great detail, and one of them has still other links in it:
http://www.medhelp.org/posts/STDs/HPV-and-oral-sex/show/1515473
http://www.medhelp.org/posts/STDs/Oral-HPV-Cancer-Risk/show/1512873
I hope you find this information reassuring. Best wishes--
HHH, MD