The name of the game is framing. You don't talk about simplicity, because most people don't really understand what simplicity is. They falsely equate it to easy.

Instead you talk about how you complete all your tasks and have so much bandwidth remaining compared to all your peers, the beneficial results of simplicity. Being severely under used while demonstrating the ability to do 2x-10x more work than everybody else is what gets you promoted.

In this vein simplicity is like hard work. Nobody gives a shit about hard work either. Actually, if all you have to show is how hard you work you are a liability. Instead its all about how little you work provided and that you accomplish the same, or more, than everybody else.