Ask HN: Why are good night vision goggles so expensive and hard to come by?
They are at least as useful as binoculars and most households have those.
Then you move onto the actual differences between the two. Most binoculars contain some lenses and other small components (admittedly the more expensive ones now also include rangefingers etc). Even the most basic (true) NVG by comparison require image sensor, processor and display.
Then you move up to the good goggles. These are the ones with anti-flare protection, more realistic colour and higher gain so you don't need an IR source (which lights you up like a christmas tree).
At the end of the day, NVG aren't just binoculars with some fancy lenses.