Cool explanation! 

We can't say with surity about the dead writers' mental state while writing, can we say it about contemporary ones? 

I mean they all are alike. The work of a writer is to leave us with more confusions rather than a conclusion. 

I don't know but all throughout the writing history, writers who wrote about dilemmas, confusions, unseen things became more popular. 

IamSINGLE

aliens_and_UFOs

Do you believe aliens have visited Earth much before 20th century?

There's a lot going on the sky, sometimes, and our brains get confused/disoriented pretty easily when reality doesn't match our expectations. 

Not to mention the possibility of these observers being in altered mental states from ingesting psychotropic compounds.