I'm pretty certain that the "football is safer than ever" crowd is lying to every kid and parent they can to keep the meat grinder full. I've called guys out for this and have been gang attacked on social media. It's garbage but the money is there for small time experts to keep their camps and clinics full.
It's also a myth that the money makes it worth it. Very few players make any kind of real money for any extended period of time. Especially under the current labor agreement that allows teams to treat players with a year or two in the league like replaceable parts. Any guy that sniffed the inside of an NFL locker room will tell you that as soon as you get close to enough with "time served" to get a pension, you suddenly can't find a roster spot unless you are a starter worth the commitment or someone gets desperate. "Just the way the business operates."
The circumstantial evidence is overwhelming. The problem with research is that you can't study guys that are alive yet, and there are still a ton of "mitigating circumstances" that have to be understood. Things like drug/alcohol abuse, PED use, pre-existing mental health problems, etc. Until you can scientifically rule them out, those factors hang over any of the results because they haven't been dismissed.
Awareness has improved the treatment options but it's all still terribly lacking. It's also created a cottage industry of clowns that sit in on a couple of seminars and are suddenly the local expert on concussion treatment. It's terrifying to have a parent argue with you about the "expert" that's telling them all of the wrong things to do only to have them come back to you in a few months and tell you that you were right after they saw a real specialist and some of the after effects have become difficult or impossible to treat now.
I don't think pension factor comes into the equation, at all. Teams aren't cutting guys because they are close to getting their pension years in. Guys get cut because they aren't good enough to be impact players and they don't have the upside left to be better lottery tickets than the younger players with less baggage. Plus, the NFL now allows for veteran salary cap hit benefit once a player has 4+ years of experience, so they only count as a 2nd year player. That is what really matters for NFL teams. That changed a few years back, so before that, sure, that was an issue, but it isn't now under this new CBA.
Also, the money is what makes it worth it and why most of these guys do it. What are the other options for most of these players, if they weren't football players? Let's even consider their options as a college grad and just disregard the fact 50% (probably much higher) wouldn't have degrees at all and 90% wouldn't have degrees from equivalent level Universities, if it wasn't for football. Just that alone is probably worth it for most of them.
What do you think they make with, mostly, trash degrees and low GPAs? Maybe average career earnings of around the median income? So an average of like $55k a year for 40 years? So $2.2M? They can make that chasing the minimums in the NFL for 3+ years and they still have 35 years of a regular job. For most people, that alone would be worth it. However, there is also the upside you can make enough money in 5 years that you and your family never have to work again.
If you are the #32 pick you get $8.5M over 5 years, guaranteed. That isn't the ceiling, but even that, for 5 years of work is astronomical. That is the kind of money where you can easily live the rest of your life without having to work at all AND leave wealth to your family.
What careers are "worth it" if football doesn't qualify as one? Are they only steady, secure jobs where you have almost no chance at life changing money, but also have very little downside?