All I can say is that a big chunk of my own antipathy towards the EU back in the day was fueled by supercilious EUphiles* who were adamant that the Expanded Universe was incontrovertibly canon. And I won’t deny that I experienced schadenfreude when those same people were forced to eat crow.
*They also tended to be diehard PT/SE apologists, which also fanned the flames of contempt.