It's not "yes it is" vs "no it won't" though. The discussion is "Yes it does" vs "no it doesn't" (present tense.) There's nothing wrong with guessing about the future, but lying about a present that is testable and unwillingness to submit to the testing is wrong.
Even then nothing is learned. Every HN thread there is on AI coding: "I am using $model for writing software and its great." "I am using $model for writing software and it sucks and will never do it." 800 comments of that tit for tat in present tense. Still nothing learned.
Doesn't help that no one talks about exactly what they are doing and exactly how they are doing it, because capitalism vs open technology discussions meant to uplift the species.