Perhaps we need trade schools too, but primary education should not be that.

Also, it's not all abstract nonsense without computers. Learning to hand-evaluate functional programs is perfectly reasonable, and no more tedious than long arithmetic by hand. I've seen students treat the implemenation like a black box, when the interpeter algorith is not complicated, which I highly doubt is good for pedagogy. (Though, as I have not studied education, I've leave that at "highly doubt".)

And finally, completely separate from the above, it's good to avoid computers for focus/attention reasons in many classroom settings. Even if they somehow could speed up learning, until we've worked out all the psychological effects of bright fast moving screens and stuff, I can't say I mind the good ol' paper and pencil that every teacher knows well.