> The problem isn’t the fluff we read online. The problem is that when you go long periods without reading novels, it’s harder to pick up a novel and enjoy it. Reading fluff online doesn’t make you stop reading novels, though, any more than watching TV makes you stop reading novels. It’s entirely possible to do both, with the caveat that everyone’s time is limited. But there’s nothing about browsing online that intrinsically makes it hard to read novels.

First, the issue isn't that what's being read is "fluff", but rather that online reading promotes that "grafted, spasmodic" style of attention.

Second, you're completely wrong that the media formats we consume don't affect the other media formats we consume.