I don't actively disagree; but we have Meditations, so if someone prefers to share in that way, they already can. Having more modes seems like a net positive, generally. (That being said, I would never claim that Today I Learned is impeccable.)

I believe Meditations is (or should be) much wider open, topically, than the rest of the site. I encourage people to use it as a personal blog. Pretty much no one has yet. Not even me. :-)
... Which, by the way, is why I created the User Posts page. And you can embed this on your homenode by going to User Settings > Sections to Include in Your Blog Stream.