This encrypted camera keeps tabs on your home while you're away

Why do people feel the need to install CCTV in their homes? I can understand how desirable it may be for those with babies so they can easily keep an eye on their child from their phone/tablet if they have to be in a different room, though it opens up a quandary of privacy questions as that child gets older, not just for the cameras in their room but also the others sprinkled across the house in general.

I can imagine insurance is pushing this mainly, offering discounts for those who install these devices and preying on those paranoid about the safety of their homes regardless of what the crime statistics actually state for their neighbourhood.