1. 70 R”Y voiced their opinion ask them.
2. not sure what tzippi’s point was
3. When situations come up and a VERY large number Gedolim R”Y voice a very clear opinion I don’t think it is for us to start bringing rayos from Chazal, Rashi, Chofetz Chaim etc.
4. Age Gap concept to the best of my knowledge started to become known around 5 years ago. I first heard about it about two and half years ago.
5. It wasn’t realized because no one chapped. Yes that’s correct. It’s simple and yet no one realized. Two independent people started looking into growing class sizes/ population growth around the same time and that’s when they realized this obvious issue. Hashem in his infintite wisdom kept Klal Yisroel in the blind until then. We weren’t zocheh and thus there are many many suffering girls as a result.
6. see 5. It’s not the first time in history that Klal Yisroel including Gedolim were kept in the blind by the Ribbono Shel Oilam
7. I haven’t been around for 1,000 years. But there are TWO very significant factors that have changed in the last 20 years
A. Family sizes. as recent as the 70’s and early 80’s 10 children family were NOT that common. Nowadays 10 children is not even considered that large (certainly in the “yehsivish circles”)
B. As recent as the 70’s and 80’s perhaps some Boys would go to EY post B”M. It’s a relatively recent phenomena that the ALL teh boys go to EY at 20/21 and come back close to 23 years old.
I hope I have answered your questions sufficiently