For every ability, there will be individuals who exhibit an above-average natural aptitude. That can certainly happen with drawing, but by and large, any person who can write by hand can learn to draw. We will not all become major visual artists, but everyone can acquire decent skills, just like everyone can learn to swim or speak decent French, barring specific handicaps, of course. As a matter of fact, up to the early 20th century, drawing was taught in school and as a result, it was common for an educated person to draw very well. After World War I, education ‘experts’ decided that drawing was difficult and better left to the specialized training of artists. From difficult, the perception drifted to mysterious and then to impossible if you don’t have a gift for it.