Because of the implied effect on things like attention span, memory, and cognition in general. It's the same reason that mastering fundamental mathematics is cr

Because of the implied effect on things like attention span, memory, and cognition in general. It's the same reason that mastering fundamental mathematics is critical, even though we have calculators. Trends in the Flynn Effect are relevant here. [1] The Flynn Effect is the observation that "real" IQ values were increasing, dramatically, for decades. In recent decades (since births in ~1970), this effect has not only decreased but reversed in the West. And it cannot be explained by dysgenics alone, since it even shows up in same-family cohorts. That suggests environmental causes are likely playing some role. Those coming to adulthood in the 90s were the first generation to really get to experience mass, endless, and cheap dopamine driven digital entertainment. Notably the [positive] Flynn effect is still in full swing in places like China and India, where digital entertainment market saturation has taken longer. So they'll effectively work as perfect experiments. If it reverses over the coming decades, as everybody over in these places now has their heads shoved in e.g. smart phones as much as anywhere else, it should be telling. [1] - https://www.sciencealert.com/iq-scores-falling-in-worrying-reversal-20th-century-intelligence-boom-flynn-effect-intelligence https://www.sciencealert.com/iq-scores-falling-in-worrying-r...