How do you know which times the gedolim are right and which times they are wrong? And can you please let everyone else know when you’ve made a determination that the gedolim are wrong on a matter?
Anytime someone points out a case when the Gedolim were wrong, an excuse is made like You didnt really understand what they said, or if had listened they would have been correct.
The simplest is, The gedolim who said to stay in Europe in the 50 year before WW II, when Jews first started emigrating to the US, the Gedolim said it was a “Traif Medina” and assur to go. When the US was closed to immigrants and in the 1930’s with the advents of Nazism , Palestine was still open to Jews (Until The 1939 White paper) and the Gedolim said Palestine was “Traif” and assur to go.
Had some gedolim emigrated to the US and Palestine (Rav Kook did go to palestine, but of course many Charedim didnt agree with him) Perhaps yeshivas could have been built in the 1910-1920’s in the US for example