Go on the All tab with the setting New to see all posts that can be read by your instance. This still allows you to subscribe to some stuff on the Subscribed tab without having any curation in the All tab.

Subscribing to a community does not curate content. All subscribing does is add it to your list of subscribed communities, so it’s one of the ones that shows up when you look into your Subscribed feed (sometimes called the Home feed). Subscribing to a community will not impact the Local feed or the All feed.

Lemmy does not have “curated content” outside of your subscriptions adding to the Subscribed feed, and your blocks taking away from all feeds.

There will always be some form of algorithm that decides which posts go to the top of your feed, but lemmy gives you lots of options to control how you want it to work, and none of them are curated by anyone specifically. There'll never be no algorithm though, you'll always need to pick something