I've just been reading about the letter on the Persephone website that describes blogging as "yammering".
It seems to me that it's Persephone that's doing the yammering - what a silly thing to write. They obviously are oblivious to how pompous and condescending their attitude is. But then, I've found this is so in many areas of life. There are always "us" and "them", whether it's in a professional situation at work, or socially. That's just human nature, sadly.
As for me I thought a long time before stating my blog. I'd read others' and enjoyed them, but hesitated to join in as I thought that I can't write as well as, say, Litlove at Tales from the Reading Room or Dovegreyreader. But then I love books, libraries, book shops and am always reading and having written factual reports for work for several years that had to be in a certain style and format I wanted to experiment and have a go myself. So BooksPlease it is, because they do please and if you'd asked me when I was a child what I'd like for Christmas or my birthday I'd reply "Books, please". Still do.