I don't feel this way at all. I can sympathize because I believe having such a pressure would make it harder to write. Since I don't feel like I need to post, I can post whenever I feel like and that sometimes ends up being a lot.
I've had that "I've got to write and therefore I can't" feeling when working on novel projects or school stuff. But my blog is likeā¦ IDK, one third of it is notes-to-self (or friends), another third of it is stuff I either start writing elsewhere but end up posting on blog instead, or, actually do post elsewhere and then paste into blog also, and the last third are things that I write for future use, like a pre-emptive FAQ kind of.