A mistake we often make I believe is to focus on code-quality, rather than code-content-quality. Code is basically mathematics. Is it good math or bad that is

A mistake we often make I believe is to focus on code-quality, rather than code-content-quality. Code is basically mathematics. Is it good math or bad that is the question. Does it do something useful, in an economical way. To write great code, I believe, means you have to be a domain expert of the domain for which your code solves problems.