> An entire blog article post to say "read the docs and enable VPC S3 endpoint".

I think it's okay if someone missed something in the docs and wanted to share from their experience. In fact, if you look at the the s3 pricing page [0], under Data Transfer, VPC endpoints are mentioned at all. It simply says data transfer is free between AWS services in the same region. I think that much detail would be enough to reasonably assume you didn't have to set up additional items to accomplish.

[0]https://aws.amazon.com/s3/pricing/