Dust in a house can cause dust mites to bread and there are many people who are allergic to dust.
Any dirt or dust accumulation is detrimental to health as it will be inhaled in the air and therefore it is one of the housekeepers priorities to keep a house dust free which not only involves sweeping but vacuuming in every nook and cranny.
Dog and cat hairs can also be an issue and cause hay fever and other problems.
A good vacuum cleaner is an asset in the house.
There are the very powerful commercial vacuum cleaners on the market as well as the lighter and more manageable lighter varieties for general use in the house.