That may be what S3 is like, but what the S3 API is is this: https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3

My browser prints that out to 413 pages with a naive print preview. You can squeeze it to 350 pretty reasonably with a bit of scaling before it starts getting to awfully small type on the page.

Yes, there's a simple API with simple capabilities struggling to get out there, but pointing that out is merely the first step on the thousand-mile journey of determining what, exactly, that is. "Everybody uses 10% of Microsoft Word, the problem is, they all use a different 10%", basically. If you sat down with even 5 relevant stakeholders and tried to define that "simple API" you'd be shocked what you discover and how badly Hyrum's Law will bite you even at that scale.