I write a lot on both WordPress and Google Plus, and Google Plus is way easier for basic authoring. Image uploading, post re-sharing, dealing with comments...all much simpler on G+. I still use WordPress because I prefer to own more important content, but I'm under no illusions about ease of management and writing.
"And businesses exist that will even make that as easy as filling out a form."
Which businesses? I recently migrated to one of the major dedicated WordPress hosts and it was anything but the trivial experience some make it out to be.