Is Mike Tyson showing PD signs?

[Primo Carnera]

I don't get the recent fascination with CTE
It seems to be a hot topic in contact sports.

Hearns shows signs of it whereas Leonard
Hagler and Duran appear to be just fine.

Toney shows signs of it whereas Hopkins
Jones and Tarver appear to be just fine.

Bowe shows signs of it whereas Lewis
Holyfield and Tyson appear to be just fine.

That's nine fighters who don't have it
And three that might. It's not a huge problem.

It is for the 3 that might have it. Bear in mind , these are the most successful fighters , who perceivably get hit less and it's a possible 25% rate.
What about the less skilled journeymen who get hit for fun?

Bowe took a load against both Holyfield and Golota
That's five fights in which he absorbed a lot of punishment.

Toney had 90 professional fights and boxed for almost 30 years
As a professional (which doesn't found his amateur career)
He also fought much larger men due to his fake weight.

Hearns had 67 fights and wasn't built for taking damage
Again he had a long amateur career and sparred a lot
He also went on too long so they were all contributing factors.

If those guys didn't box what would they have done?
They were given the opportunity to make millions.

Totally agree, it's their choice , they're all grown men and it gave them a good life. And I don't have all the answers, I'm no doctor.
But to say "I can't see what the fuss is about", just seems a bit flippant.