When creating a game, is it better to have complicated but interesting mechanics, or simple and understandable mechanics?

From a design point of view, I can understand that simple mechanics can be picked up easier, but complex mechanics allow for more depth and learning.

I'm making something with different mechanics for crafting, brewing, movement and a bunch more.

Should I be worried about overcomplication or not?

What benefits could there be in having higher/lower complication?

If there is a scholar article about this, it would also be a nice thing.