Upton Sinclair once said this:
It is difficult to get a man to understand something when his salary depends on his not understanding it.
I learned long ago that if you are wondering whether some activity is a good thing, don’t bother asking someone who makes a living at it. Whoever it is—a professional musician, a paid clergyman, the head of a parachurch ministry, a schoolteacher, a university professor, a real estate agent, a lawyer, a career legislator, a homeschooling conference speaker, a homeschool curriculum creator, an intellectual property creator—will give you all the pros and none of the cons. And, really, it’s unrealistic to expect them to take a detached look at the situation.