I haven't seen Maleficent either; but, that was exactly the impression I came out of the movie. That said, I have a gay friend and he said it was a movie about homosexuality and coming out of the closet and accepting yourself.
I didn't read into it that at all. I don't know which intended meaning Disney had when they adapted the story into a script and animation; but it seems to resonate with different people differently (as is often the case with movies).
I saw it in staunch contrast to the historical Disney "Princess" narrative, where happily-ever-after doesn't mean marriage, remarking how they openly mocked the idea of falling in love with someone and marrying them after a single day.
I'd have to ask him directly, but he could have easily seen the movie from Elsa's perspective, the woman imbued with a gift, or curse. Both perspectives are presented in the movie, if memory serves me, and it entirely depends on the person speaking at the time. The parents thought it was a curse. The trolls saw it differently. Whatever the reality of her situation, she fled, and then accepted who she was, and eventually defeated the parts of her gift that had made it so sad to have.
Perhaps, then, it is both. It was a movie that was a push away from the 'True Love's Kiss' story of Disney olde, as much as it was a story about accepting who you are. And the whole story is bound together by the very real presence of the two sister's familial love for one another.