In my experience the focus should be on avoiding incidental complexity. Essential complexity born from business problems are counter intuitively often better left complex.
Depends on where you're working on the stack. Humans processes ( accounting, HR, etc) are complex by having evolved in world of murky definitions, but they work because people generally understand things and fill the gap. When trying to model those, then yes for sure things are going to look complex and you don't have much choice.
However, for all technical things, then i've noticed that things can be made quite obvious if you really focus on the exact problem you actually have to solve, and have a good understanding of its nature.
