come on, dude Just because someone disagrees with you, they're not calling you out
In this case, he's more right, you're more wrong.
That's not true. The guest account will not be enabled with IIS installed. Also, I don't think you can access those administrative shares without an administrative account. The "Everyone" access applies to the files for people with physical access to the computer. So, in the end, the system is not much less secure than before.