No. I "comprehended" what he was saying just fine! I just think it way off, is all. And I think if you brought those points up in a serious boxing gym they would laugh in your face. Again, be my guest to try that!!
A "systematized approach" to boxing is training to punch from various angles, training to be mobile in the ring, using covering/bobbing/weaving, etc as a defense. While there are some variations, "boxers" stick to that pretty closely. For you to say that there is no one "boxing" is wrong. That would imply that you couldn't pick out someone with a background in boxing by watching them move. There is such a thing as a "boxer", and then there can be variations on "boxing." Just like there is such a thing as "Karate" and then there can be variations of "Karate."
While there are some vulnerabilities in what they do if they are facing someone on the street.....that does not mean that strategies used in the ring, like angling away from a direct punch, covering and returning a hit on another line, moving around with a jab to confuse before closing on another line, etc wouldn't work if facing off with an attacker in a parking lot. Heck, most Wing Chun guys use a stance that is vulnerable to leg kicks and takedowns!
You really think a boxer that has given half a thought to what he would do on the street doesn't realize he needs to cover better when he isn't using gloves, or be more careful in how he hits to protect his hands???? You don't think a boxer that takes his art seriously hasn't done some light sparring with buddies when they were neither wearing gloves?
Here is at least one guy that would disagree with what you are saying:
https://www.amazon.com/Championship-...s=ned+beaumont
Good book. I've had it in my library for many years.