there is no universe where Tyson loses this.
Boxing is not a "complete" martial art, but that doesn't matter. A boxers handspeed, power, head movement, and footwork are superior to pretty much every other discipline outside of a few exemptions.
If you have sparred with a boxer, a real boxer, you know its a different league. And we're not talking about any boxer, we're talking about the best in the world at the height of his powers. When even the 2nd and 3rd best boxers were afraid he would kill them