For example, you're cleaning a room, your home or your apartment. And you find it defeating the purpose to dust things and wipe them down because, dust comes back anyways and eventually. It might not be as bad as it was or as bad as it could be, but you'll always end up with dust and cleaning dust is just a grand waste of effort and time.

It doesn't defeat the purpose if you have allergies. Also dusting prevents allergies by eliminating potential particulates etc. you can develop them anytime. I have dust everywhere in my house. I don't have a duster, but I have to constantly rewind certain things on shelves that I use. Not decorations though.

Many things will just keep getting dirty making you clean them over and over. The carpets, the dishes, your car-- it is all maintenance.

Dust isn't as important, though. But if someone in your house has asthma or allergies, it would be. I only wipe down dust on an as needed basis.