Did you not read my comments about actual teachers?
Just from that by yout remark, the education system would collapse.
We operate in an organisation where people come in, not really knowing very much about it, except we wear an RAF uniform and go flying. Other than that they have to fit in and do things. Expecting to get every single bod off the street come in and be into the subject matter we cover is naïve. People join as they want to do things with teenagers and feel they have some time on their hands to do so.