I agree there have to be different skill levels but I think that distinction has to occur within denominations like 'full stack' and 'DevOps'. These labels simply determine what you do not how skilled you're at it.

In my opinion, full stack and DevOps is the normal, sane way of approaching software development. Artificially dividing up roles into labels such as 'front-end', 'back-end', 'database programmer', 'system administrator' only leads to more silos, less collaboration and sometimes even downright hostility between these roles.