Generous of you to assume that someone who walks in, sees something somebody else has written and immediately calls it shit... Has something of value to say.
If they did, why did they hold it back just to speak so contemptuously of a subject that is actually interesting and reasonably well explained?
I think I see where he is coming from. Using math to prove that you can’t tune stuff, will to some, sound like using a laser leveling tool to prove that you can’t make a perfect pizza.
Technically they called it testicles, not shit, but your point stands.
Generosity is worth having by default, though. Filter people out when they burn it explicitly.
There is a quantum of earned generosity. Someone saying, "This doesn't seem right" has jumped to a conclusion, but they aren't getting personal about the author or the work.
Whether it's testes or testy language, getting personal and insulting does not meet my personal standard for assuming good intent and being worthy of an open-minded attempt to create constructive dialogue.
But I applaud you for wanting to lift the standard of discourse!