And why do we need digital literacy any more than machine gun literacy or brain surgery literacy or anything like that? Except Alan Kay, everyone knows perfectly well how useless programming is to anyone but the professional programmer.
I think the "learn to code" movement should eventually evolve into "learn to X", where X is something that does prove to be widely useful, and for which "coding" is a prerequisite skill. Data analysis strikes me as a possible value for that X.