Doersh el HaMaitim
See the Minchas Elazar where he mentions that there’s a Gemara (Berachos 18b) – among others – that Shmuel and Zeiri went to Gan Eden and “Chatzer Maves” to ask his father and his landlord, respectively. He says that it’s unimaginable that Amoraim would violate Doresh El Hameisim over financial matters. Oh, and he also mentioned that the Arizal sent his students to prostrate themselves on graves of Tanayim and Amoraim so they would teach them Sisrei Torah. Look there at length.
The Idea that it is somehow legitamite to play fast and loose with Halacha to justify minhagim.
Look at the Minchas Elazar who justifies clapping on Shabbos, dancing on Shabbos, eating in a Sukkah in the rain, or not eating in the Sukkah on Shmini Atzeres. Or look up all the places where even the Shulchan Aruch says “… יש ללמוד זכות על”. It’s not rare. Lubavitch is by far not the only community which does those rare things, which, on a surface level, violates Halacha. See the Minchas Elazars I mention above. Oh, and Lubavitch isn’t the only community which doesn’t sleep in a Sukkah, other Chassidic communities did the same.
(Yes @rso, your Tayna isn’t on the etzem not sleeping in a Sukkah. Your Tayna is on the logic of the Moreh Hetter. But you’re not the only one here.)