Well, I guess I’m not one of those really smart people. I think the idea of a “marketplace of ideas” is entirely of western origin and has no source in Judaism. We believe in the concept of absolute wrong and absolute right, and one should not expose oneself or one’s children to ideas that are contrary to Torah and Daas Torah.
Chassidus was a new idea, and many were opposed to it like the Vilna Gaon. There was much opposition to it and many were put in Chareim
The idea of educated girls was also a radical idea and Sarah Schneier hit alot of opposition to the idea of Bais Yaakov and they were not even accepted in Hungary (They said the Poles needed it)