I'm pretty sure that it's assuming that advanced users don't need sample files. The PDF is titled fmp12_tutorial, not fmpa12_tutorial. If you visit the link you quoted, there is a fmpa developer guide there, which says nothing of sample files whatsoever. I wonder if the installer for the regular version places the samples as you note?
Also, as you note, there is a link that does take you to the page where you can download those sample files (and more), just in case it was not in the files installed by the regular FMP installer.