[mancerayder]

Counterpoint: you don't know what you don't know.

When scrolling Hackernews, intriguing topics abound that I never thought about before, much less even asked myself the question about. And I read the comments and become interested in a new area.

Counter-counterpoint: attention moves to something else before much learning was performed...

[jezek2]

I would use the term "reading" than "scrolling" though. Scrolling implies that you don't really care much about anything and just mindlessly consume content.

[dalmo3]

Agreed. There's value in being attuned to what's there. It's breadth-first learning.