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.
Have not see Maleficent, but I have heard nuts claiming Frozen was some kind of pro-gay film. It is resolved by (non-romantic) love between family members. I saw the movie twice in theater with my kid and couldn't find ANY indication of gay-ness. Anna ends up going after a man. The main plot is about self acceptance and embracing who you really are. While that metaphor can easily be applied to being gay (in todays world), I suspect the only people who instinctively made the connection are either gay or terribly anti-gay.
Gotta love Elsa, her and Merida are the best.