I believe the main reason is that children are just more imaginative and uninhibited than adults. They aren't afraid to express themselves, and drawing is a natural outlet for their creativity. Kids often use drawing to tell stories, explore their feelings, and make sense of the world around them. In contrast, adults tend to be more self-conscious and might worry about whether their drawings are 'good enough,' which can really hold them back from drawing as freely as children do.
子供たちが大人よりもずっと想像力豊かで自由奔放であることが主な理由だと思います。彼らは自己表現を恐れず、絵を描くことは彼らの創造力を発揮する自然な手段です。子供たちはしばしば絵を使って物語を語ったり、感情を探ったり、周囲の世界を理解しようとします。一方で、大人はより自己意識が強く、自分の絵が「十分に上手いかどうか」を気にしてしまい、そのために子供のように自由に絵を描くことが難しくなってしまうことがあります。