I know many educated, licensed teachers assigned classes outside their specialty who took the books home the night before so they could learn what they were supposed to teach the next day. Homeschool teachers do this too. There is nothing wrong with modeling learning.

The problem is people who think they know it all based on outdated credentials, who don't bother to keep up to date with new developments/curricula. The people on my Board of Health are like this. Ordinary citizens are much more informed than they are because they got their ticket stamped decades ago and are now stuck in time.