People get them not because they are worth anything or make you a more capable teacher but because the education system is structured such that you need the credential to rise in the education hierarchy and make a higher salary.
The do not make you a better professional, they just make you higher level, better paid member of the education establishment with a bigger ego and sense of self worth.
Just look at Dr Jill - she is the poster child for the EhD. .
I think the degree is Ed.D. or PhD. We used to call the education degree the DED.. Or doctorate in education. you are correct in assessing their value. Most universities do not hire them outside of education departments as they do not count for accreditation.