Learning programming is worthwhile for the logical thinking skills it involves: I'm all for making it available. The problem is that putting such an emphasis on it, at the expense of other useful subjects, is going to backfire for those who can't learn it.
It's not PC to say so, and there are lots of "experts" who insist it ain't so, but programming is a talent that not everyone has. Anyone who has been in the business knows that, unless they never interviewed new people and never worked with anyone who hadn't already proved themselves. Anyone who went to college for CS knows that: there are always good students who try but just can't be taught to do the work. Genetic, or some unknown environmental factor, or whatever, it's a fact beyond debate.
I have no idea what the percentage is in the general population, but there are going to be smart, productive people who can't do this particular thing, and they're not only going to be wasting their own and their teachers' time, but they're going to be labeled as failures because of something no one can change.