Gaon, your point is noted but that is a separate discussion than what we’re talking about. And there’s answers to your point. Your point would be no different than regarding the first Chasidim when they went to Nusach Sefard. And they have answers justifying it. There’s nothing particularly unique in this regard with the Oberlanders who became Chasidim.
The discussion here is about changing the mesorah, minhagim and hashkafas from your father and grandfathers mesorah. In that regard, the Oberlanders who became Chasidim are no different than the Yekkes who became Litvaks.