I'm a professional...and have taught. I don't have a "teaching degree" though...but I can teach.
Like any profession...there are idiots with "degrees"...I've met many. Doctors, lawyers, professors, nurses, teachers...etc..etc...that were morons.
Frankly...I totally think core academic's could be taught by many lay-people. I know I could. And I ain't that smart...........
FRegards,
.