The 90/10 "view point" for me stems from hunting Western states. Take a look at general/over the counter units and success rates hoover around 10%+\-, especially with archery. It's usually the same hunters year over year having the success too. It's more of a generality but harvest stats back it up pretty dang close.
Take a look here, hunters like DA kill way more deer than I do and Picketstateforest blows my Turkey average out of the water.
I did find this article which states that Nationwide, hunters were 48% successful at killing one deer then dropped to 27% for killing at least 2. So you can use your imagination and see that very few hunters make up a huge portion of the stats.
Which region and state have the most successful deer hunters? In 2017, the Southeast took top honors with South Carolina leading the way. We determined this by surveying every state and provincial wildlife agency on the percentage of hunters who harvested at least one deer and the percentage who...
www.deerassociation.com
Like I said, it's a general rule and specific to my experiences but it's probably not that too far fetched.