Tolkien is not the only voice to listen to about LOTR. He sometimes contradicts himself, uses deliberately ambiguous language and occasionally leaves things open to interpretation. Interpretation is our business here, I think. His opinions about his own work changed over time, as we can easily deduce from the manuscripts published by Christopher Tolkien. Which version is the authentic version? Which version is authoratative? We all have an opinion on that, some backed by more textual evidence than others.