No they don't. The content of my blog has nothing, not one tiny little thing, to do with what you want, or what the Anonymous Coward wants, or what every reader of my site wants -- it's up to me.
I've given you technical posts in the past, be happy with them. If you never get another one from me, then tough luck. And if that means my readership shifts from nerds to puppy-lovers then fine, I don't mind. Next week when the puppies are gone I may switch to photographing bottles of vitamin pills, or writing 3 line poems about France. This is my site, and I couldn't give a damn what you like, what you expect, or if I bore you.
Now, bugger off and read one of the millions of other sites out there that deal with technical matters. I have work to do.
(And please don't bother replying to this, I'm not interested in debating with you.)