DY
It was a poorly worded way of pointing out that every chumra comes with a kula.
(A rebbi of mine often told the joke of the newly married brisker who told his wife the day before a taanis not to forget to prepare him breakfast, On the morning of the fast he finds two settings set for breakfast he tells her “No No you need to fast, didn’t I tell you when we got married that my brisker chumros are only for me)
Normative halacha allows for eid echad neeman bissurim and assuming chezkas kashrus in frum people.
The people Joseph knows are perhaps being machmir in kashrus but in so doing are being veeeery meikel regarding the din of eid echad neeman, and giving people chezkas kashrus.