The problem is very few people do the same job in software. You're not writing the same code, in the same domain etc. Looking back to jobs I've had in the past,

The problem is very few people do the same job in software. You're not writing the same code, in the same domain etc. Looking back to jobs I've had in the past, my job was always different even from people on the same team. We specialized in different parts of the code base, or using different technologies or just gravitated towards different focuses. e.g. I was the data guy, we had someone else that was really good at debugging hard problems and someone we'd always consult for API design.