Is There a Barrier to Entry?

There are not that many scientific papers analyzing their language. Why do you think there isn't a ton of stuff analyzing the language? I remember with eliot roger's manifesto, it almost became like a joke because of the way he talked. And i feel like a lot of people don't know about the manifestos. They know they exist, but they never actually read them. Is it just because of the length and it's a big barrier to entry? Or probably a part of it?