Lakewood
Because they dedicated their lives to carrying on the oral tradition of the Torah and learned every possible second and we’re tremendous Tzaddik and did great acts of kindness were able to avert evil decrees with their Tefillos lead Klal Yisroel…
And for the record “my Rabbeinu told me they are” is a very valid answer. Klal Yisroel has a mesorah. One needs a Rebbe. Sadly there has been a big breakdown in this area where people want to be independent and are turning their backs on dass Torah and don’t realize that what has kept us going strong all these years is our mesorah which is passed down Rebbe to talmid the connection to the Torah of the previous generation and their guidance.