You're absolutely right. Its core story is about love, and I cry through half the movie every time I see it because of that, which is what makes it such a great movie. I do recommend everyone see it, and I plan on viewing it regularly throughout my life. But just because I'm also a space nerd, I cannot help but over-analyze the terrible decision making in the movie: https://medium.com/non-violence/gaping-plot-hole-in-interstellar-movie-nasa-never-even-mentions-atmosphere-breathability-dee8ba5d9ef0