What type of teaching skills were covered? Many- and you would know if you had the pedagogical training.
If I knew I wouldn't have asked you

Although I'll accept that the answer suggests I didn't ask the right person. Mea Culpa.
There are questions in here about starting teaching from students that must have missed those classes. Certainly I've had the impression [from previous questions and discussions in here] that their education has focussed on their own playing and so on rather than teaching others. Which is a different thing.
Although I'm aware that higher level students in other areas tend to teach lower students, certainly in science and maths, it wasn't clear what form of degree level you think is enough.
w.r.t business 101 stuff and buying quicken. I think you're right to note that it's missing from some, with and without degrees. However that's not something that I learnt from piano school [not the least because the limited companies I have run don't teach piano] I suspect you didn't learn it there either? If not, nothing in your response about why you are professional because you can do basic book-keeping suggests that a teacher without a degree couldn't do the same.
w.r.t being good with kids and so on. Did you learn that at college? If not, again, I can't see why that aspect couldn't be true of someone without a degree.
w.r.t to pedagogy. What material did you get that isn't available outside college?
AFAICT, the various piano methods and techniques aren't secret documents available only to universities and colleges. The subject is widely discussed in here in much detail. So again, I find it difficult to comprehend what a teacher without a degree couldn't have learnt elsewhere. Indeed, when you are teaching, and I'm assuming that you teach outside of college, should I assume that your teaching is inferior because it wasn't done at a college? Do you hold back the college-only secrets from your students?
Anyway, the point was, there are a few folk that post here that teach and don't have degrees afaiaa. In your opinion some of them shouldn't be teaching. which is, imo, laughable, not because of any credentials or words that I have to say, but because of their words. I invite you to go and read them.
Your response when asked what you know that a teacher without a degree couldn't possibly know was just to say "If you went to college you'd know" Which is hardly a stunning argument is it?