I agree that the ad is tasteless. But let’s look at this from a different perspective: does Apple actually come to your house and destroy your piano and your watercolors?
No. You can buy a different kind of tablet (Windows, Linux). Whatever tablet you buy. you can choose to use only the features that enhance your creativity, instead of discouraging it.
You can learn how to draw using pen & paper in your free time.
These are just tools, The decisions are ours on how to use them.