Simplicity is not about making something without ornament, but rather about making something very complex, then slicing elements away, until you reveal the very essence.
If you look at any designer you admire, whose work inspires you, and whose approach somehow resonates with you, I promise you'll find a person who does not think of what they do as just their job.
Design is a funny word. Some people think design means how it looks. But of course, if you dig deeper, it's really how it works.
A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.