The "spoofer" is *only* for known problematic websites. The rules are visible here:
https://github.com/M-Reimer/togglereferrer/blob/master/spoofing.js#L34
If you come across some website which does not work with Referrer disabled, then you may open an Issue here:
https://github.com/M-Reimer/togglereferrer/issues
describing which website this is.

The goal of the "spoofer" is not to spoof random Referrer values but to make websites work well even without a valid referrer. The idea is to spoof just as much referrer as needed to make the website happy.