Most people learn many things from another people like Students learn from their teachers. Of course some of them are influence something from their friends or their co-workers, but actually people learn more from professors. So I do not agree that people learn more from their peers or co-workers. There are some instances to support my opinion.
To start with, the reason that i believe people learn more stuffs form professor such as teacher of supervisors. Not peers. Almost teachers have more knowledge and more intelligence to teach students, so they can provide more something for another people who want to learn or need to learn.
The other word, teachers have more learning stuffs than students' peers or co-workers. Thus, people can get much more influence from professional teachers.
Another reason, peers or co-workers are not enough to teach people. They can cooperate with other people but cannot teach something that people should learn about their own lives or schooling. For instance, most students learn from teachers not only knowledge and school stuffs, but also comprehension that to arrange for their own lives. Sometimes we can ask teachers something for our lives time to get some advices or whatever we need. However, friends or peers cannot teach it, because they do not have much experience and knowledge than regular professors.
To conclusion, I am confident in saying that people learn more from professor such as teachers or supervisors than peers of co-workers. They would provide much more influence that people need for own lives or school.