I don't see that this method would necessarily result in you getting stuck dogmatically. If you refuse to acknowledge that your initial success was merely luck/accident, then it would seem easier to think "well, my method is perfect." If you realize it's a random dogma and that you could have gotten similar results from a dozen other dogmas, it encourages you to experiment and start narrowing in on the dogmas with the greatest returns.

It's also, in my experience, VERY difficult to measure success until you've had a taste of it. I was shocked the first time I did a successful exercise routine - I'd never known it could be so easy and enjoyable. Now I can quickly discard any dogma that says I'm supposed to suffer, at least until I hit a wall with my easy and enjoyable methods :)

This reads like a recipe for locking-in into your own randomly generated dogma.

I'm coming back to this years later, but, wait, what? How does one learn, then? How does one separate true stuff from false stuff without engaging with it, without wrestling with it, without trying to disprove it, without applying it?

When you don't know, you don't know what you don't know. How can you know, except by doing something intelligently accidental? Even if it's just doing the exercises at the end of the chapter?