The Brisk Myth
The assumption by the OP and some commenters is that Brisk is the top yeshiva. By deductive reasoning, one should expect our Gedolei Yisroel to have Brisk on their resumes. Sad to disappoint, but they do not. Now, this is not a put down for Brisk. It has a reputation, not because it produces the most superior products, but because it is one of the most selective. If it’s hard to get admitted, it must be top. The same logic is the doctor who only takes appointments months in advance. If it’s that hard to get an appointment, it must be a better doctor. Well, that’s a myth.
Brisk follows a derech of learning that is great for some and not so for others. Rav Chaim ZT”L was Sar Hatorah. He was as capable as anyone to learn with depth. But that was not his derech. And his learning was not inferior. It would be pretty audacious to minimize his Torah learning since he neither attended Brisk nor did he use their derech.
If we refrain from this form of “identity politics”, we might avoid serious pitfalls.