“If your Rav says the bourbon is 100% ok, there’s no reason not to listen to his psak.”
And that holds true for EVERY area of halachah. Aseh l’cha rav is a commandment in the mishnah and it is there for a reason. Even if every gedol in the world disagrees with your rav, you follow your rav and not the gedolim as long as he has legitimate semichah and has a connection to the mesorah.