Not really. It's more of so I know what happened if the needs arise or if we're away.
I've watched people pull up around the house, step out, see the cameras in the back porch, make an abrupt return to their vehicle, then back down 300' of driveway because they think I didn't get their plate on the way in and they can avoid it if they don't turn around.
The ones out in the woods are for trespassers. They're really aggressive here.
Most of my 'hood has been broken into at least twice since we moved here nearly a decade ago. The most I've had is some kids steal an armload of firewood.
There are downsides. The biggest one is when you get to watch a racoon systematically kill your chickens slowly and painfully for shits and giggles (catch, tear up, release, rinse, repeat, and never eat them).