Right, and I have some brushes that I use. My point is why not have a set of brushes in the engine by default? Again, going to the example of Photoshop, if it came with only a circle brush and I had to make/download every brush I wanted to use I would not use Photoshop for as many things; especially as someone not specializing in 2D art. With the new engine focusing one open worlds and usability (it going free and all) it just seemed like the perfect fit.
P.S. If you need I could even create a brush pack to include if no one is willing to support this. It is more for the developers who do not focus on terrain as their specialization or the people who are just learning Unreal.