Having been a Pediatric RN for over 20 years, as well as having worked for 3 years on an in-patient children’s psych unit, I can say that diagnosing a toddler with bipolar is not possible, let alone ethical. Looking at their developmental stage bolsters this.
It’s been 21 years since I worked in psych, but in the mid-late 80s, the psychiatrists I worked with (and most other docs) would not put such a heavy duty diagnosis on a child, let alone a toddler. There would rarely be a teen diagnosed with it, but it wasn’t common. They preferred to hold off on that diagnosis for later adolescence if possible.
Bipolar has nothing to do with how a child is raised, although their could be co-existing behavioral problems along with it.
Sounds right to me.