Can you actually imagine a promo committee evaluating the technical choices? "Ok, this looks pretty complex. I feel like you could have just used a DB table, though? Denied."
Absolutely not! That discussion happens in RFCs, in architecture reviews, in hallway meetings, and a dozen other places.
If you want simplicity, you need to encourage mentorship, peer review, and meaningful participation in consensus-building. You need to reward team-first behavior and discourage lone-wolf brilliance. This is primarily a leadership job, but everybody contributes.
But that's harder than complaining that everything seems complicated.