Most people don't listen with the intent to understand. They listen with the intent to reply. They filter everything through their own paradigm and experiences, so that what they hear may not be what you said.
Business must be run at a profit, else it will die. But when anyone tries to run a business solely for profit... then the business must die as well, for it no longer has a reason for existence.
You can't be a professor without having been a student. You can't be a consultant without having been a research associate. So, if you outsource the least sophisticated jobs, at some stage, the next step of the ladder has to follow.