When is Social Learning Appropriate?

I ran across this blog that talks about when social learning is appropriate versus formal learning.  We have been learning about many different Web 2.0 tools this semester and how they can supplement or even replace formal learning.  However, this blog talks about times when social learning is likely not appropriate.  Jobs with routine work and standardized tasks such as bank tellers, cashiers, merchandise stocking crews, etc. are better suited for formal learning versus knowledge work with task variety such as software developers, professors, scientists, etc.  The author argues that routine work leaves little room for task variation and requires standardized skills.  The skills that need to be learned are narrow and focused, so standardized formal training is more appropriate than learner-centered exploratory learning that occurs with social learning.  The blog contained the graphic below, which I thought summarized the point well.

You can check out the entire blog here: Social Learning Blog