I don't either...
I don't believe in Psychogenic seizures either but only because I know our technology is making breakthroughs in what we see now in neuroscience.
I went for a year and a half having seizures 2-3 times a day lasting 20 min up to 8 hours and NO doctor could find anything wrong with me. I went to a Psychologist, Acupuncturists, homeopath, MD, had a CT, MRI, EEG, blood/hormone work up, dietitian, the guy that does blood sugar issues, I forget the title. The Psychologist said nothing was wrong with me there. The acupuncturist said it was because my body was ready for children. The homeopath wanted to do vitamin infusions even though my mineral levels are ok, they suggested I was pre-menopausal and that I had hypoglycemia. That my seizures were me going into insulin shock like diabetics experience. Someone even suggested I was posesed by demons and only GOD could help me. They all concluded basically there was NOTHING wrong mentally or physically.
Then I found biofeedback and went to a neurologist who has a DEEG. An EEG measures around 28 places in the brain while a DEEG measures 128 places. There are only 10 machines in the world. He saw my abnormal electrical activity in the first 3 minutes of our hour-long test. There is also now a connection between seizures and Bi-Polar disorder. The two sciences are starting to believe the mental illness is actually a low-level seizure disorder due to the fact that the treatment for Bi-Polar is and has been anti-seizure drugs.
I'm excited to see our world develop. We know very little and are progressing. Psychogenic seizures is the name they use when the seizure doesn't read on an EEG, just like mine, they assume it's subconscious trauma. Much of the psychology of this idea comes from Freud who while he was working with people with epilepsy also said it was subconscious trauma. This has shaped our mental health due to his daughters efforts to promote his ideas for corporate profit. In the end, the psycho babble was just babble, these people classed as "hysteria" patients then, mostly had epilepsy, which as we now know is physical... Interesting right?