This can be overdone too. It depends on whether the junior developer has even tried or thought about it before asking for help. If the rule is to ask first and

This can be overdone too. It depends on whether the junior developer has even tried or thought about it before asking for help. If the rule is to ask first and always, the junior developer might as well not be there because the senior developer is doing all the work awkwardly via the junior developer, and the junior developer is not learning how to do anything except say "what now" to the senior developer all day.