My Librem 5 is using an elegant 3D-printed version of the back plate made from nylon. It was custom made for $70 by some company online using their 3D-print service. You could custom make one with the hole for the camera removed. Then there would be no hole, and it would be completely covered over.
As far as WiFi, removing that won’t even leave any marks. It is designed to be removable. Unlike the camera, the WiFi is extremely easy to remove and is in the removable section on the back.
Given that the main design is to have hardware switches to turn off cameras and wifi – at least if you trust those switches – then I would tend to want to assume your complaints are mostly not really a major concern and are easily resolvable for the Librem 5.
Even though they are not easily resolvable on other “phone” devices in today’s society.
I should think that difference speaks volumes.