The "using only the Go Standard Library" was added to the title when it was posted to HN. The post builds an example app with the stdlib, but I don't see advocacy against using other code in it. I think python.org leaves writing a Django introduction to the Django people; this seems like that.

The Go community does have a tendency to avoid building or looking for all-inclusive frameworks, but, e.g., gokit.io, gorillatoolkit.org, and various third-party database tools (sqlx, gorm) are still popular.