Updated: Jun 17
Reason why to use makeup brushes. It looks much better - You might think it doesn't make a difference, but even professionals use brushes when they're applying makeup.
The only reason you're not seeing the brush strokes is because they're usually so small and light that they aren't noticeable. And if you do see them, it's because the person applying their makeup has much more experience than you and knows how to do something subtle and natural. Basically, finger painting with your eyes closed will never look good.