That's only true if you plan to use some of the many AWS "services".
Get an instance, choose some linux distro image that comes with ssh and nginx installed, start it up, configure a few files, grab an elastic IP, you're done.
I set up the first public web server in the pacific northwest in 1993. It wasn't that hard, but mostly because I already admin'ed the machine(s) it ran on anyway.
[0] https://cernlib.web.cern.ch/cernlib/