Just like buying a paint can, filled with paint, the paint can’t magically make it on to your wall without a couple things first...
You need to get a couple rollers, a rolling stick, sandpaper, primer, splash guard, paint plate, tape, gloves, etc. just to get the paint on the wall and have it look decent.
The other items that are sold are upsell's in your buying process. What these upsells do for you with your paint project is speed up the process of painting your wall.
