I like the crock pot for certain things -- chili, bolognese, carnitas, turkey stock after thanksgiving, braised brisket flat, caramelized onions.
After (spoiler alert!) Jack Pearson's demise a few years back, unattended crock pot safety was WIDELY discussed. The informed consensus is that, yes, you can leave your crock pot home alone. So long as it is relatively new, in good shape and used properly. Remember that Jack wasn't even cooking anything in his crock pot. He had an old garage sale cooker with a switch that was known to be faulty. Then he left it plugged in, empty, and right next to some flammable curtains.
Personally, I leave it on overnight no worries. And I use it during the day when we are coming and going. Probably not if the house is empty all day long, even though that should be quite safe.