So, at one point, His Excellency invited myself and about 3-4 other seminarians over to watch a video about Garabandal at the old "Convent" building (there were no nuns there), St. Joseph's chapel because ... it was the only place they had a TV.
I disagreed with Bishop Williamson on other subjects, went for very long walks with him debating sedevacanctism vs. R&R. He really wasn't averse to disagreements at all, but I don't think anybody would take the tone of "correct"-ing him, but merely not agreeing with him, which is how I express it even to this day. I recognized that I'm a layman. I didn't know what to make of Garbandal, honestly, since I hadn't spent 15 minutes ever looking into it ... just didn't care.
I think he actually respected the fact that I was open with him about what I thought, since not only did His Excellency grow tired over the years of all the sycophants, and therefore found my respectful disagreement refreshing in a way, but also realized that there were undoubtedly many seminarians who were closet sedevacantists but who kept it quiet in order to secure ordination. After I left STAS for sedevacantism, they actually welcomed me back after I had changed my mind.
Bishop Williamson, if he had one predominant fault or flaw, it was his clinginess to preternatural stuff, like apparitions, revelations, etc. ... and that's actually why +Williamson almost slavishly followed +Lefebvre, because he saw the Archbishop almost as some kind of oracle of our day, which he clung to due to the confusion of the times. Between Garabandal, Valtorta, Akita, etc. ... and there were even thing that I'm sure he would have disagreed with +Lefebvre on regarding the crisis had he not bee so convinced about +Lefebvre's pratically-infallible status. Our Lord instituted the papacy to be THE ROCK, to keep the faithful anchored to true doctrine, and true religion ... and absent that rock, there's a huge vacuum, and many unconsciously try to fill that void in their sensus Catholicus with private revelation.