Yes, we agree.
And the way they chose to “limit such an approach from becoming mainstream” was to ban its sale, ban it from all shuls, ban it from all Battei Midrash, ban it from all homes, and characterize it as having the “spirit of haskala.”
In other words, it is so compelling and attractive that had they not banned it from all homes and all battei midrash, it would have become so popular that it would have become mainstream, supplanting Rashi (the cherem says this was their goal).