The headset allows the scooter fork and handle bars to spin around and is critical to the scooter function. Like wheel bearings, headset bearings do get damaged and are frequently changed. They are a consumable item.
When you purchase a headset, you will get 2 bearings, a top cap which prevents getting dust in the top bearing & also looks nice, as well as various compression rings which just holds the headset and fork together in the right place. Sometimes some of these items are obsolete depending on the other components in use on the scooter.
Quite often headset bearings can replaced as single items removing the need to get all the other parts in the Headset kit.