I think it is important to make the distinction between "blog post" and other kinds of published writing. It literally does not matter if your blog post has perfectly correct grammar or misspellings (though you should do a one-pass revision for clarity of thought). Blog posts are best for articulating unfinished thoughts. To that end, you are cheating yourself, the writer, if you use AI to help you write a blog post. It is through the act of writing it that you begin to grok with the idea.

But you bet that I'm going to use AI to correct my grammar and spelling for the important proposal I'm about to send. No sense in losing credibility over something that can be corrected algorithmically.