Why would I make you log into my web site? You don't have to. Your call. I know it is another password to remember (although iOS and MacOS will remember it for you), but I don't need every opinion or random item out there in the public. I want to be able to share things that don't need to end up in Google. What if I want to go into politics? Plus with all the hacking and all the snooping that Facebook and Google do, I feel I do need some privacy. This will allow me to post things that are for friends and family only.
Oh yeah, and you can also have summaries sent to your email, daily or weekly that outline what has been added. It an easy way to keep in touch, but of course, I won't send you any emails unless you ask for them. Honestly, I do most of this for my Nana.