We have a large park in Missouri and I sat thru the installer class. It was a great experience and very educational. The state takes the installations very seriously.
In the class their were ample examples of installers who tried to do their own and the outcome was bad.
The inspector is your licensed expert. They are not trying to add unnecessary work and expense. I would just go with all the things the inspector is asking you to do and you can verify this with your licensed Installer or the inspector's manager as well.
All the best!