It is where Larry shows a little of his own inconsistency. Only wearing danner work boots doesn't make you a man. If you must wear nice shoes, or just like to, you take care of them. A shoe horn keeps you from wrecking them.
He did the same thing in the bit about clothing sizes for men.
OTOH, the article was addressing his sons, who are likely to be gigantic like him, so I cut him some slack.
The point of the article was right on, 100%. Real men do as they like without concern over what others think a "real man" should be, with the only absolutes being be yourself, be self sufficient and take care of those you love.
I've known fruity tuity guys who are real men and I've known gruff masculine guys who are real men and everything in between, because it's the core qualities that make a person real, not the superficial bullshit.