People run far and wide to receive a Bracha form a Tzaddik… Rebbe……. Mekubal. here the Rama promises a Bracha to one who is careful to even drink water in the Succa. If the Rama were alive, how long would the line be to get a Bracha from him??? Here we can get one guaranteed!!!
The brisker Rav probably did not seek Brachos form anyone………..