> People rather argue that the safety excuse is BS and people do not require being a Linux expert to detect spam, that they can also get over the landline or in person knocking on the door, for that one needs common sense and some not completely bad education.

This ignores human nature and reality. People are easily manipulated at scale, and the proof is that the scams and spam calls continue. If it was a matter of "common sense" then those things wouldn't be as prevalent as they are.