I think the other reason is that I am just not good at planning ahead, so I write what is on my mind at the time and post it, because if I wait, it will no longer feel relevant to me.
Same! The majority of my writing is spurred by a quote/event/etc. that happened in the moment or if it is about a past event, it's because something in the moment spurred that memory. I feel like pre-written posts would lose that raw immediacy. I also have a whole file of topics to write about (when ideas that come to me in the moment but I don't have time to flesh them out), but many I never get to because I look back on them a few days later and they no longer feel worth writing about. Btw, a 5-year posting streak is impressive!
I have the same issues! I used to keep draft ideas in a Wordpress account, but had over a thousand that never got worked on :)
It is a good habit though, but looking back at some of them it is clear, I need to take better and more meaningful notes, as often I have no idea what the post was going to be about .
Yes! Often, though, I'll remember what the post was supposed to be about but whatever quality made it interesting to me at the time has faded. Sometimes I'll write it anyway, but usually it ends up being a hard slog, though occasionally the act of writing revives my interest in the topic.