IMO, the problem stems from mainstreaming special needs kids. It helps neither the special need child (as we see here), nor the other students in the class. So much of the teacher's attention and time is devoted to the special needs child and preventing harm to other students.
In kindergarten, since the DX and IEP take time to establish, the lone teacher has no help in the classroom at all. A 20 to 1 ratio is NOT sufficient with a special needs child and no aide to help.
Everyone suffers.
I think the word "perhaps" is the problem. I think most people agree she SHOULD have done it differently - no "perhaps." But most likely she shouldn't have done it publicly at all.