A blog is a journal. It's a place for manifesting things that would vaporize in the interstices of daily life otherwise. Journals are inherently indulgent. If journal writers weren't indulgent they would shrug, say who cares about these daily thoughts and not do it at all. We love to read journals, though, because we care about what happens in the privacy of someone else's mind.
I'm guessing Steve would agree that writing from within established institutions probably poses more danger to one's thought processes than the current indulgences of blogging.