If anything, I agree with your side of the argument the most, Aroxy.
Love is only a "choice" in a case such as mine. I don't get involved with the romantic sort of love since I choose not to, but I'm pretty sure that I'm capable of feeling it (Never have though). The only "love" that I care to feel is that which is felt toward family and good friends; it's obviously quite different from what's being referred to here, but I wanted to throw that out there to make sure that no one thinks I'm saying "I have a black heart, I cannot love." xD
Love itself is a feeling. It's an emotion. Really, I can't say too much of this on the subject of romantic love, but I can say plenty regarding what you feel toward family. I never CHOSE to love any member of my family; I simply love them by nature. And I'm sure that the same love was lodged at the back of my head from the moment of birth; it's an instinct for a child to love their mother/family.
Are they saying that we all have a set path with who we love? That's a little extreme.