Where is the harm? You can be in both worlds at the same time.

If we think of Leonardo da Vinci he created both art that created problems, and inventions that solved problems. But these world where very separate.

Your mental models of the world are reflected in how you interact with it.

If you have an idea that there's a split between "creating beautiful stuff" and "creating useful stuff" then your world turns into one where something is only one or the other where someone creating only does one or the other.

These days it's thought of unique or special if something is both and the fact this isn't standard is influenced by the mental model of them being separate.