No, not quite.
Again, no, not quite.
This time, just no. The fact that you didn't learn anything, does not make it so. Anecdotal evidence of one, is just that, not fact. Have you actually done the programs for ore then 6 months?
I happen to love the principles of 5/3/1, so no arguments.
But to say that you will learn nothing from the other programs is just plain false.