Yes, Definitely, Write simple as much you can, That is why most of the bloggers have recommended using simple and easy to understand words while writing a blog post for your blog, and that's the reason of their success, I have heard many bloggers have said they know a bloggers who write article in a way that Even a child who know how to read can understand the meaning by reading his article.
I don't think people are simple. Well not those who are able to understand IT (internet technology) and do blogging on the internet, anyway.
It's just that most of us are very busy people and hope the facts stand out clearly and reach our brains quickly and effectively!