These words are totally accurate. The goal of a profession/ business is no more a secret. And in short, for business both party should be on equi-level. Here, a teacher is playing a role of a guardian or sometimes more than guardian.
You can justify these statements. If your parents think about business-profit & business-loss then this will be a typical world. I don't know, what happened then. I strongly recommend that a tacher shouldn't be a business person. You can think, what happened if teacher will start his profession with more profit clients, Ya I say clients and he can left the non-profitable clients. The structure of society will got ruined then. You can see in more of cases, more of popular B-Schools. This path is dangeroous for democracy too. Govt. should make a regulatory, specially for Child caretakers, teachers. They are the responsible persons for the Future.