Because those need attention. If I'm waiting for my Lyft to take me to my book club meeting, like I am right now, I only have three minutes. I can't use that to

Because those need attention. If I'm waiting for my Lyft to take me to my book club meeting, like I am right now, I only have three minutes. I can't use that to make any progress on Conjectures and Refutations. So these things have poor cost structure for what they provide. I like The Economist on my morning fifteen min BART for instance. And that's because that's dense. But if I have half an hour, that's enough for me to read something worthwhile instead of this stuff.