The shows are a half hour usually, not an hour, aren't they? I have no idea how long it really takes to shoot. I just said what Kate said, and I have no info to tell me otherwise. If it's a little longer, then it is. I've read several places they are all set up in the house, they have a small place for the crew in between takes, and the shooting is 2-3 days. The Duggers have a lot more family to cover so they may take longer.
I don't know for sure, Kate may be lying. But in any case, it wasn't silly, unless you have proof it's a lot more hours.
In my opinion, they can do a half hours show, just from what I have read, on an ongoing series in 6-9 hours. If lines need to be learned and are flubbed, etc, I've read it could take a lot longer.