You're addressing a different issue; at-fates-hands was addressing the issue of "keeping your FTP credentials in plain text" whereas you are discussing that plain FTP is an insecure protocol (a point I fully agree with). The site does say:

  "The Azure dashboard doesn’t seem to give easy access to your FTP
   credentials, and they are not the login and password you use everywhere else."

Likely the difficulty of finding FTP credentials is because FTP isn't the preferred method of publishing your site.