Presumably search chairs prefer to schedule meetings at times convenient especially to themselves. After all, they are often very busy individuals. They forget the sacrifices others not in administration make. Of course, searches require expertise, which doesn't always come with administrative rank. But non-expert chairs may still be eager to make their mark, often being tempted to favour their own disciplines rather than meet students' needs.
Academic excellence is heard to measure.
We need humility and selflessness to recognize talent wherever it's found. We need chairs and committees that encourage and facilitate that recognition. We also need colleagues who are always seeking to improve their own standards. Not that measurable academic excellence is the only important thing, even at a university. When all's said and done, what remains is the students we teach or have taught and the research we try to advance, which, one hopes, also advances civilization's best chances.