and relatively easy to upload things
That's a problem, not a feature.
1. New people are able to upload trash quality content without a moderator to delete / not approve it.
2. Experienced people are able to upload malicious code that installs remote backdoors or destroys entire blockland installations without a moderator to stop the content from being released. Sure, someone will find out, but then 20 new people will already have it downloaded, lost everything, and quit the game forever.