Film is offensive to the psychiatrist profession
If I were a psychologist or psychiatrist, I would find this film as well as the others in the series highly offensive. In the films, psychiatrists were portrayed as either complete morons, or at least as not even at the same level of intelligence as mental patients!
In the first film, the psychiatrist that Stephanie consulted wanted to talk to the Stepfather to discuss her problems. But instead of going through the proper channels, he posed as someone wanting to buy a house from the real estate firm where the Stepfather worked and so needlessly got murdered.
At the beginning of this film, the psychiatrist that examined the Stepfather had a most annoyingly patronizing attitude. He went to the extreme to show how understanding and “caring” he was. That black dude clearly believed himself to be superior and smart, but actually the Stepfather had completely outwitted him. The psychiatrist had a smug look on his face as he turned his back to the Stepfather to drop down notes and immediately received a drill through the neck. So we see a mental patient actually outwitting and even manipulating the one who was supposed to cure him!
Worst of all, later the same escaped mental patient was even able to pose as a psychiatrist specializing in “family guidance” and nobody noticed anything wrong or unusual. In the film we even see the Stepfather giving a therapy session for a group of women. I shudder to think what kind of “advices” this “self-taught” psychiatrist had given to those women!! But I guess most of those women were probably quite crazy anyway – like the one who talked about making “songs” for her husband as she was doing something naughty.