In his first point, he says that "maxing on squats every day" actually means "Here, the daily max is a weight that you can move without mental arousal (no death metal and ammonia) and without any aberration from perfect form."
Yeah, it's strength training as practice, not strength training as straining against the weight. You only train as hard as you can with perfect form, and get better at doing that lift. It's especially useful for folks doing a sport centered around lifts - powerlifting and weightlifting - because you just get better. The lack of a daily grind-down means you're not straining so hard that you'll outpace your recovery.
In a lot of ways, this is what runners do - go out, hit some miles, hit more tomorrow, too, get better at running. Don't sprint yourself into the dirt and take a day off, but just run all the time and improve. Ideally, martial arts training is the same - do all the good kicks/good punches/good triangle chokes you've got in you today, don't do any sloppy ones, and go home. Come back when you've rested. Over time, the number of good ones will go up even if day to day it varies.