How many people in the county of 45,000 people are actually going to be there? What about all of those tens of thousands that can't get to it? (Let alone try to fit 45,000 people into the building.)
How are those people going to learn what was asked, what information was shared, etc. unless something like the media, oh heck, the media reports it and spreads that information so everyone has the opportunity to learn it instead of the few hundred, maybe 1000 at most that would fit in the town hall?
So instead of all of the county residents having a chance to hear things first hand, get the same questions they have, answered, only a few hundred or a thousand will get to do so. This is why we have the media because they can get that information to a wider audience.
This is why what the Sheriff did was, quite frankly, stupid.