The best engineering manager I ever worked with got made redundant. Not for poor performance. The opposite. The team ran so smoothly without her that when the company restructured, leadership looked at the org chart and decided the role was unnecessary. She had done her job so well that she made herself invisible.
That story stuck with me because it gets at something most engineering managers never confront: your success is measured by how little you are needed, but every incentive in the system rewards you for being indispensable.
Most engineering managers build teams that depend on them for decisions, context, priorities, conflict resolution, and the daily translation layer between engineering and the rest of the business. They call this leadership. It is not. It is a single point of failure with a job title.
Gallup's research found that managers account for 70% of the variance in team-level engagement.[1] Seventy percent. The way you manage is not a contributing factor to whether your team thrives or stagnates. It is the factor. And if you are the bottleneck through which every decision must pass, you are using that influence to create dependency, not capability.