Do you really mean this? Or do you mean "When you blog, be honest. Don't pretend to understand things you don't."?
Blogging about things you are learning about, especially if you invite feedback, is a great way to learn and to build a shared understanding within a larger community.
But I agree 100% on the fake-it-till-you-make-it posts on blogs and LinkedIn. That stuff is a blight on the web.
ADDED a concrete example: Consider this post: https://blog.moertel.com/posts/2026-07-23-on-the-nature-and-.... Do you think that posts like this are useful? Or net harmful?