If anyone at any company judges an engineer who crafts code that is easy for other engineers on their team to immediately pick up and start work on as more repl

If anyone at any company judges an engineer who crafts code that is easy for other engineers on their team to immediately pick up and start work on as more replaceable, that person is hopelessly incompetent. That would normally be a basic skill every engineer is expected to pick up before getting too far in their career. If anything, an engineer with a clear tendency to try to write themselves job security is the one that should be replaced ASAP.