In the vain laughter of folly wisdom hears half its applause.

Being laughed at by people who have not thought much about the matter is weak evidence that you are onto something. Only half, though. The laughter tells you that you have left what is easy and common, which is where a better answer would have to live, but leaving is not the same as arriving. Plenty of nonsense gets mocked too, and deserves it.

When something you say draws an eye roll, ask who is rolling it and whether they have done the work. If they have, listen closely. If they have not, do not let their reaction decide anything, and do not treat it as proof either.