So that's where Claude's verbosity comes from.

Because a defining feature of those people is confusing the appearance of seriousness with seriousness itself, just like they confuse their ideological preference with rationality.

Rationalism is for people who have the reading skill. If someone prefers short videos, it means that the doors of rationalism is closed for him.

  Nearly every blog post I have read in this ecosystem, even the rare one that contains some good ideas, is painfully long and extremely tedious.

Most of them are too smart to have brief thoughts, but not smart enough to have succinct ones.

There's also rhetorical advantage in spewing so much stuff that you snow your reader under a blizzard; what's worse, some of that tends to be true.