It didn’t used to be. When you set up a bucket with public read access, you might also decide to give other people on your team write access to the bucket. AWS

It didn’t used to be. When you set up a bucket with public read access, you might also decide to give other people on your team write access to the bucket. AWS conveniently provided an All Users option for this. Except it wasn’t “All Users in your AWS account”, it literally meant ALL USERS of AWS. Disaster. This led to the same problems as this Jira issue. AWS changed it so that’s no longer an option. Atlassian should do the same.