AWS: What's the point of setting bucket-level policy?

Question

What's the point of setting bucket-level policy, now that the individual objects will be always be private by default and have to be individually made public?

Answer 1

I believe bucket policies can still be used to make all bucket objects public to anonymous users. For example, taken from the s3 docs here:

{
  "Version":"2012-10-17",
  "Statement":[
    {
      "Sid":"AddPerm",
      "Effect":"Allow",
      "Principal": "*",
      "Action":["s3:GetObject"],
      "Resource":["arn:aws:s3:::examplebucket/*"]
    }
  ]
}

This bucket policy would make all objects in the bucket publicly available to anon users.