A typical knee jerk, intuitive response instead of a reasoned and informed response to an aircraft defect.
You are right about folklore existing in general aviation. On the other hand to be fair, students and their instructors can only glean this information if they can find it from the appropriate aircraft maintenance manual. They could search around for a local LAME to obtain his opinion but how do they know he is correct or merely offering his opinion and can he quote an approved maintenance document. Or they could Google the question like this:
.
https://www.google.com.au/search?sou....0.ahAh1725mp0
It is all too easy to throw stones and there is no shortage of people more than happy to do that on Pprune, unfortunately.