One of the scariest aspects of horror movies -- especially ones involving families -- is the toll it takes on the innocents. It's been seen with the Amityville franchise over the decades, not to mention the likes of The Exorcist. It's the same for the modern era, per properties like Sinister and of course, The Conjuring.
Source:https://www.cbr.com/insidious-5-labert-family-dark-toll/