Well the good thing is you can edit and delete on the frontend - for example I could edit this reply if I wanted to. BUT, on the blockchain you're right, the old posts will always be hidden in the background.
You're totally spot on that we need better tech to entice more people. I'm optimistic it'll happen, just based on how the Internet and computers in general took so long (decades) to catch on in the mainstream.
Thanks for reading! Glad to hear that you're digging it.