If the child is truly saying “I’m a boy” all day, every day, over and over again, whatever one thinks of the transgender issue, that kind of obsessive behavior is a problem. And it would be a problem regardless of whatever the child was obsessing over.
Yes, it would-Kids that young do not develop obsessive behaviors like that all by themselves-they are influenced by the adults close to them-like parents-I’ll bet a competent psychotherapist would find that the problem is the mom-probably has Munchausen by Proxy-it is more common than most people think...