"Simplicity is a great virtue but it requires hard work to achieve it and education to appreciate it. And to make matters worse: complexity sells better." - Edsger Wybe Dijkstra.

Simple/complex is subjective. Software domain is very diverse that it's unlikely we'd agree on them.

Take mathematicians, for instance. They generally have a shared sense of elegance/beauty. That's the result of a refined intuition from years of study.