The reasoning “concerned” has goes like this. Issac and Matthew Van Komen, both essentially centers from the same class and from Utah, were each considering Utah. BUT, if one committed to Utah, the other was likely to go elsewhere. They were not both going to Utah. And both kids had Gonzaga listed in their top choices. Someone knows what happened, I don’t. But some believe, including me, that Gonzaga let Matthew know that he needed to wait for a scholarship or that he was not their top guy. So he committed to Utah. By virtue of committing to Utah, Issac is likely the preferred target of Gonzaga and that is where he will likely end up. Now this is just a story, based on supposition. It could be all wrong. But that is why concerned said what he did, I am guessing.
Gonzaga did offer both.
https://247sports.com/college/gonzaga/Season/2019-Basketball/Offers