Simplicity is contextual
A static site is simple for public publishing. A database may be simpler for concurrent transactional updates. Judge the whole system: maintenance, security, recovery, cost, and the knowledge required to operate it.
AI makes this more important
Cheap code generation does not make dependencies or operational state free. Ask what each layer contributes, what owns its state, and how it can be removed. Prefer explicit, understandable mechanisms over speculative flexibility.