Interesting topic for sure... hard to say.
Wouldn't hurt to have that option that's for sure!
Even beyond personal regrets of post... Information is always being updated. A blog from last year on one topic, might not be totally correct or is missing info, and it requires updating in order to remain useful and informative.
All of a sudden you have many steemit blogs with information that isn't updated.. or is no longer relevant clogging up the bobbily for users searching for the correct and most up to date information.
Yes, It is a complex issue.