Joseph said
>>If someone follows a shitta that he must be drunk ad d’lo yada – and according to his shitta that means until he doesn’t know the difference between arrur haman and baruch mordechai, he is a tzaddik for doing so. <<
He is only a tzaddik for doing so if it does not come at the expense of other mitzvos. Regardless of how drunk one gets, they still have a MITZVAS D’ORAISA for krias shema, and benching. And they need to do it in a disposition which is befitting of standing before the king. Certainly you are not suggesting that the D’Rabban of drinking trumps those TWO mitzvos from the Torah.