This extension does not allow you to adjust how a given patch works - for the reasons you wrote. You are 100% right. This extension allows you to configure the availability of certain spoofed surfaces for specific sites. Moreover, this extension does not try to override the protections that Firefox uses, e.g. in the case of limits on the presentation of the amount of available RAM.

Your opinion is completely correct if we assume that most users will use Tor Browser. However, it is 2026, and it does not seem that Firefox will regain its position on the market. The idea behind this extension is to provide very basic (relative to what the browser manufacturer could do - and often does not do) protection for users of mainstream browsers. I use Helium and Zen myself, depending on the context of the work I do, but I am aware that most people will reach for a browser whose manufacturer sunsetted Privacy Sandbox a year ago.