+.
It may be that he did research beforehand and that issues arose during Yom Tov ( part of the Kashrus team couldn't make it etc. )
Nothing wrong with asking
Kashrus, especially the practical issues, and even more so in a commercial food service setting, is definitely not the expertise of most Rabbonim, and even someone who you might look up to in other issues and would be a ירא שמים, might be simply unaware. This is to the extent that he would even consider having a Pesach Program in a place which was not fully taken over. As stated above:
100%. A non-starter for any serious Rav Hamachshir.
Yet, someone obviously did it, and learned from experience that he shouldn't do it again. That this specific Rav didn't have the insight to foresee such an issue ,might serve as an indication that he shouldn't be in this field at all!
So if these things are an issue for Rabbonim who are active in the field, why would you assume that a תלמיד חכם who might give excellent and inspiring shiurim, might even be aware of potential Kashrus problems?