Which part exactly is untrue? The part about how there has been public discussion about football's relationship to brain damage since at least the early 1980's, or the part where I said we've learned much more over the past decade, which is pretty much what you said above. Whatever the state of public knowledge 10 years ago, the public is pretty well informed today.
The fact is, this has been researched for decades. In any given kind of inquiry, the amount of newly discovered information will decline over time as there is less and less to discover. The notion that all kinds of new information about heretofore unknown risks will come out is based on the assumption that such unknown risks exist, which by definition is...something we cannot know. But we do know it's been studied for a long time which suggests there may not be much more to discover.
If something new and important comes out, I'll reconsider my position. Until then, I will stand by my assumption that the public is largely informed at this point, and that the consequences of that are at least near fully realized as of today.
Its your original first and last statements, and now your above statement that this has been researched for decades are at issue. The topic hasn't been well discussed, and certainly hasn't been well researched until recently. In 1994, how can there be any objective discussion when the league commissioner says "On concussions, I think is one of these pack journalism issues, frankly… There is no increase in concussions, the number is relatively small… The problem is a journalist issue." How can anyone have an objective discussion when the chairman of the Mild Traumatic Brain Injury committee (who has zero experience in traumatic brain injuries) says in 1994: "We discuss it on the list of things every time we have a league meeting … We think the issue of knees, of drugs and steroids and drinking is a far greater problem, according to the number of incidents.”
The NFL only started to research the issue in response to scattered publications finding associations between concussions and downstream consequences in the late 90's, early 2000's and the NFL group concluded that there was no significant concern of concussions. They went as so far to state in 2004 that "As a result of this winnowing process, those players who ultimately play in the NFL are probably less susceptible to MTBI and prolonged postconcussion syndrome than the general population." Really? Let that sink in for a moment. They really argued that NFL players were at lower risk for post-concussive symptoms. The connection between football and long term neurological consequences was only recently made. Amalu's case report of Mike Webster's brain is barely 12 years old now, and that was a major trigger of the research (and focal point of the NFL's vitriol). And if you read the publications published by the NFL, they throw as much shade as possible into the research of others at the time, whenever anyone found a piece of evidence associating football with long-term neurological consequences. Instead of taking the more objective route and saying that more research is necessary, they follow the same argumentative techniques of Big Tobacco, going as far as to demand Omalu to retract his study. They make repeated statements like this from their October 2004 publication: "These players did not have evidence of pyramidal, extrapyramidal, or cerebellar dysfunction. They did not have clinical dementia. They clearly did not have chronic encephalopathy such as that seen in boxers." Deny, Deny, Deny. This is why you have people like Dr. Casson repeatedly denying that there's any connection between multiple head injuries and long term neurological symptoms into 2007.
Why was it only until December of 2009 that the NFL finally admits a connection between concussions and "long-term problems?" Its only after that admission do you actually see the league act by changing rules and concussion protocols. This was not a result of decades of open discussion, it was in direct result of the evidence published in 2005-2009 suggesting a connection.
Ultimately, the data that everyone wants to understand the risk of playing football, simply, does not exist. Everybody wants to know: "If I were to play 1/5/10/20 years of football, starting in childhood/HS/college, what is my risk of developing CTE?" This is exactly the critique that many in defense of the NFL had in the recent publication by McKee in JAMA that found 110 out of 111 NFL football players had CTE (in addition, 3/14 high schoolers and 48 of 53 college players had CTE). At worst, CTE occurs in at least 3.7% of NFL players, but that makes many assumptions (namely that the 12 NFL players who had an autopsy, 12 of them had CTE. If we presume that all other players who died between 2008-2010 did not have CTE [321], that's how 3.7% only results), and is probably a gross underestimation. Why does this even occur in high schoolers? Is it one traumatic event? Is it the summation of subclinical events? These are valuable and reasonable questions at this point, for which there is a paucity of data.