The over engineering creeps in anywhere there is collaboration. It’s not a Java thing, it’s a corporate thing. The new teammate who refactors the perfectly working sql pipeline; the teammate who makes story points a required field on your trouble ticket system, the teammate who just saw a conference talk on rust and wants to apply it etc. Most engineers are not zen masters seeking out simplicity; they are lost with poor grasp of desired business outcomes so they procrastinate by adding complexity and indirection and focusing on tech as if it were the destination not the journey.