It is good common sense to not leave your valuables out where they are easy to steal.
Maybe you don’t need a safe for some things, but you should still put them out of sight, so people aren’t tempted to take them.
I think everyone understands to not leave a pile of money on the kitchen counter, even if you trust the people around you it still doesn’t make sense to leave money sitting out. Or jewels, or any other little valuable items that can be easily taken and hidden in a pocket. With all that said, no one ever expects something like a toilet, sofa, or a space heater to be stolen. It is the middle of the summer, so the space heater was packed into the back of the closet. It’s not like it was sitting right near the door and someone took it on a whim, the thief had to dig into the closet to get this space heater! There were only fifteen or twenty people at this party, and with something as big as a space heater someone must have seen it being stolen, right? The big thing for me is figuring out why someone would bother to steal a space heater at all. They don’t cost that much, and I rarely use it for heating my home, so I doubt I will even replace it until next winter. So losing the space heater itself is actually not a big deal, there are way worse things that could have been stolen, but I am so puzzled as to why!