Well... no. If you could say a magic word that induced a seizure, you would be prohibited from saying that too.
They are both mental triggers. You literally "trigger" a seizure. I know a person who any mention of rape brings her to attempt self harm. It's genuinely not that different.
I like to think that if you had a good point, you'd be making it, and that it wouldn't involve a really desperate attempt to equivocate between "trigger words" and photosensitive epilepsy.