I mean (almost) anybody can learn to draw. It's not rocket science. All you have to do is keep drawing, for hundreds, thousands of hours. If you have at least one working eye and hand, it's just a question of practice. Same with pretty much any "artistic" skill.
Engineering is harder, because you can't just practice it on your own at home. You have to work on real projects with real people and witness how it all works together in reality. Books can help, and practice too, but it's not all.