Please don’t take this the wrong way, but that is like saying that AWS EC2 is “just a wrapper” of Xen, or that AWS RDS for PostgreSQL is “just a wrapper” of PostgreSQL. There is an entire business around those with value add/sales/support/marketing as well as a strategy for growth.

Wait until you hear about Heroku!

Who's "they" - Netlify or Gatsby?

It's fastly. Fastly dns' points to a server in located in CA.