In defense of brotherly love - Samwise Gamgee and Hermione Granger

As is well known, my favorite book is The Lord of the Rings trilogy by J.R.R. Tolkien.  In this masterpiece that launched the modern fantasy novel genre, the character of Samwise Gamgee follows his "master" Frodo on the journey to Mordor to destroy the one ring.  It is well known that Tolkien modeled the relationship between Frodo and Sam after the relationship between officers in the British army during WWI and their assistants, known as a "batman".  The relationship between Frodo and Sam is one of the greatest example in literature of brotherly love, loyalty, and friendship.  It should come as no surprise, then, that some would rather view this relationship through a sexual lense, wanting to see the Sam/Frodo relationship as a homosexual one.  Such a view would obviously ignore the intent of J.R.R. Tolkien, as the author, although for many this hurdle means nothing, but it would also destroy the nobility of the relationship for it would take away its most important quality: selflessness.  Sam is loyal to Frodo, and loves him like a friend, is there something wrong with leaving it at that?  Must every relationship have a sexual angle, can nothing be altruistic?
A similar thought occurs with J.K. Rowling's Harry Potter series, it has been reported that the author considered having Harry fall for Hermoine, instead of what she actually wrote which had Harry's friends Ron and Hermione end up together.  What was written is far superior, however, for it makes the friendship between these three paramount, and their willingness to risk their lives to support Harry in his quest is more noble without the angle of sexual attraction and romance that would have made Hermione's choice to stay with Harry when Ron left temporarily in the Deathly Hollows a self-centered one instead of a self-sacrificial choice.
Romantic love is crucial to society, helping to hold marriages together, but there is something to be said for simple brotherly love, devoid of sexual connections, for love such as this has often changed the world.  "For God demonstrates his own love for us in this, while we were still sinners, Christ died for us." (Romans 5:8)