Being a certificated teacher does not mean the teacher is a good teacher, I have experienced plenty of bad certificated teachers,as well as good ones.,neither does having a driving licence make someone a good driver.
MCgrath is spot on here
Three truths.

There are some circumstances where there is only one right way to do something. But more often than not there are in fact alternatives which are also "right".

Different people learn and relearn in different ways.

We should never assume that what is easy for us is easy for everyone, or that what is hard for us is hard for everyone.