That's a pretty vague checklist. The one for my Beech is several pages.
So given the lack of details, I look at it this way, FWIW.
The inspector is required to "remove or open inspections plates,..." in order to inspect "systems and components." He's not required to
dissassemble systems and components. Yes, he should look behind the panel to confirm that the radio is securely mounted and interface wires are not chafing, but he's not required to dissassemble the radio to determine whether any printed wiring board traces are cracked or whether there are any cold solder joints.
The goal should be to find a balance between a conducting thorough inspection versus being so intrusive as to risk inflicting new damage.
In your case,...
(a) Each person performing an annual or 100-hour inspection shall, before that inspection, remove or open all necessary inspection plates, access doors, fairing, and cowling.
An interior panel needs to be removed to see the connection to the static port. If the port needs inspecting, that panel must be removed. So does the pitot-static system have to be inspected?
Well,....
(b) Each person performing an annual or 100-hour inspection shall inspect (where applicable) the following components of the fuselage and hull group:
(1) Fabric and skin - for deterioration, distortion, other evidence of failure, and defective or insecure attachment of fittings.
(2) Systems and components - for improper installation, apparent defects, and unsatisfactory operation.
Is the pitot-static system a system? Of course. Should it therefore be inspected for "improper installation" or "apparent defects?" Yes, it should, if that can be done with the simple removal of a panel. If it would require dissassembly of the system, then no. In your plane, the pitot-static system had a very apparent defect as a result of an improper installation.
So, IMHO, it should have been examined during your annual. YMMV.