“100 years ago there was not a single thought by anyone that a woman had an active role in the Shul.”
That is a poor argument. Not contemplating something in the past doesn’t mean that thing is bad. 100 years ago nobody contemplated frum EMT services, the Modern Kollel system, seminaries in Israel, cell phones, cds, etc. ect.
Your argument would be better if poskim did think about it 100 years and rejected it.