I've seen quite a few streamers that click through the text and don't care about the story.
It's even more common among playtesters. Ever noticed how some games seem to go out of their way to avoid any subtlety and repeat the major plot points at least 4 times? Or give way too many hints for the easiest of puzzles? One of the causes is that a game was playtested within an inch of its life.
Someone ended up optimizing for the kind of player who doesn't care much, because the playtesters didn't care much - they were only there for a paycheck.
But I've also seen a couple of streamers that can just scan entire pages into their mind in a second and click through text while retaining all the information.
I thought myself a quick reader, but even I was in a disbelief seeing someone read this quick on the first playthrough.
Game text is highly patterned. And since gamers generally can't be trusted to read long text, it's easy to extract the actually important parts, by design, if you practice it a lot.
It reminds me of one of the things I consider a secret programmer skill, which is the ability to watch logs streaming by at a fairly fast pace and still stand a reasonable chance of picking out the one log message that stands out and means something. This also depends on the fact the logs are highly patterned.