Basically, digital art is a completely different beast than traditional art. Yes, digital art is more difficult than traditional art for those with more skill and practice with traditional art. But, traditional art is more difficult than digital art for those with more skill and practice with digital art.
Digital art requires no less skill than traditional artmaking, but it does require a different mode of thinking. Yes, a digital device will have the ability to make a stroke look and layer like watercolor or give the texture of drawing with charcoal.