I understand, but I also think that this relativistic way of thinking isn't particularly useful, either. Sure, everything's interesting to somebody, but if I had a blog and posted a 10-part series on "Best food trucks of Columbus OH," I should be pretty darn confident that almost nobody would care.

Blogging is writing, and the first two concerns of any writing, especially writing that you want as many people as possible to read, should be purpose and audience.