Painting a large commercial building is a process that goes much smoother and quicker if you use a scaffolding system. Most professional painters will prefer a steady scaffolding system over even a cherrypicker or hydraulic crane, which are also both more expensive than a scaffolding system. A scaffolding system allows a handful of painters to be working on the building at once, making the job more time efficient that if just one person is working from a crane.
There will be times when an area of a home or building that requires repair is high enough off the ground that you can not reach it. While a ladder may work, it may not be the safest or easiest way to get the work done. Scaffolding can change that for you and is typically a lot more comfortable to work from. No more hanging off the building like Spiderman, but instead, solid, safe, and a comfortable to work from.