It seems to have been the prevalent Hanhaga in the days of the Rama. Like many Poskim and like Tosafos and Rishonim, that was a reason to search for a Svara as to why this is the Halacha. I think that the concept of a make-believe Limud Zechus, that you don’t actually believe in, came later.
We don’t wear Tzitzis on a scarf, and no one ever did. This prompted the Beis Yosef to invent Svaros, that we rely on, as to why this is the case. Clapping on Shabbos and not washing Mayim Achronim, are Heteirim taken from the fact that it was not Nahug.
I don’t think we can find any Tannaim or Amoraim that had multiple wives (besides for perhaps if there was Yibum and ??? ???? ?????). However, perhaps in the days of the Gemara it might have been feasible for both to be in the Succah.