as someone pointed out in this comment, I don't think deleting all the content we generated thoughout the years is a good idea. I still get replies on years old posts from people who had that same exact question, and the amount of information I actively find on reddit is crazy. Reddit won't care about deleted accounts and posts (and they will only be a minority anyway), and I think doing so is a disservice to every person on the web.
Unless you only posted in r/memes and r/askreddit lol