[away]

The main reason to learn new things is that it offers growth opportunities to having a fulfilled life. Sure, I can spend all my time specialized on one thing, but it wouldn't be as satisfying because a good life is about balance.

[kiba]

When you specialize, you will learn more indepth about your field. You don't stop learning.

Of course, a good life means humans must learn certain life maintenance skill and social interactions so that we can function and hopefully be happier overall.