Two points.
It’s plausible. As plausible as anything else that anyone writes about Disney films. For years there have been many articles that look for hidden meanings and symbols in Disney classics, so this cannot be dismissed out of hand.
But even if it is a Disney-esque exploration of royal psychology, so what? Kids watch the movie for the songs and simplistic plot. Only an adult would go searching for these sort of deeper messages.
That’s one of the reasons that I disliked my English lit classes so vehemently. The teacher would take a perfectly decent story or book, and analyze the crap out of it. Essentially she tried to impute meaning onto the story that the author didn’t every intend. I remember reading Faulkner’s The Bear in 12th grade English and thinking – Faulkner wrote a simply novella, and Mrs. <teacher> has gone way off the deep end.
So, @ragingloli back to your question. It’s plausible, there is some logic to it. So what.