Why is an appeal to authority bad in a context of non experts? I mean would I dispute the space time curvature with friends? No but if I did someone would point

Why is an appeal to authority bad in a context of non experts? I mean would I dispute the space time curvature with friends? No but if I did someone would point out hey, all physicists think so and so. Not atop physicist? Not great to oppose this opinion. The strange thing with AI is that everybody has an opinion because they think it's a soft is.subjective science, easy to predict because of sci-fi novels.