Seatbelts are highly recommended, for obvious safety reasons that practically everyone understands and agrees with.

Unfortunately, in the condition my mom's car is now in, the seatbelts no longer function and aren't even usable anymore. If it counts for anything though, she barely even drives it maybe once or twice a month right around the corner to occasionally get a few groceries and her medicine and local stuff.

She almost never puts it on the highway anymore, unless absolutely necessary. She gets most of her groceries and products delivered anymore.

Usually I'd say there's absolutely no excuse to not wear seatbelts, but in her case it's a malfunction of a worn out piss poor design, she only drives it when necessary.