@non political
OK but there are also plenty of times where a yachid reveals a chiddush which is a valid path in Avodas Hashem. Shivim panim laTorah.
Also it seems to me, although I could be wrong, that there is a halachic “due process,” like by the gemara they hashed out their proofs for their opinions, and then voted on the final halacha.
So, your example doesn’t seem to apply here because :
A) Afaik there was only one gadol who came out against this chiddush as the opposite of Avodas Hashem cvs, while the others did not, even if they wouldn’t claim it as their own chiddush. So if anything, that one person would be the yochid here.
B) did even that one gadol really hash it out with the Rebbe and follow “vshoalta vchakarta vdorashta heitev?” For obvious reasons we won’t discuss b, but you can respond on a.