If a website contains only technical articles, people won't relate to the author. He will be one fish more in the big ocean. We can see an example of this in StackOverflow; highly reputational users are providing a lot of value to other programmers, but most remain unknown (and they might want it).
On the other side of the spectrum, people mostly talking about their personal lives. They don't provide a lot of value in a technical sense, because they aren't teaching, but readers/viewers can relate to them. They know how to tell good stories; they are engaging. If you are a YouTube user, you know a couple of examples of what I'm talking about.
The sweet spot is to find a balance between the technical side and personal life. Teaching people how to do things and talking about some personal stories that they might find interesting. Authors that can mix and match technical and personal, have a great advantage.
Hi, I'm Erik, an engineer from Barcelona. If you like the post or have any comments, say hi.