Things were bad for jews in Europe even before 1933. There was mass starvation and pogroms, Why do you think Jews came to the USA. Why was it called the Goldena Medina. People needed incomes.
And What if The Gedolim said, NYC is the largest Jewish Population in the World (And this was in 1900) Lets send some of the biggest Gedolim there to start Yeshivas, to run shuls etc. There were already over 1 Million jews in NYC in 1900. How many yeshivas could have been built, How many Neshamas could have been saved.
And Not only that , when the Holocaust DID occur, they might have been in a better situation to lobby the government to help the Jews, Instead Steven Wise was Roosevelts right hand man and he had his own ideas (as did several Jews in Congress at that time)