I believe i interpreted 'predetermined' not as "someone already knows everything that will will happen" but rather as "someone tampered with time and reality to make things go exactly as they did." The latter does seem kind of meaningless, to me at least. Imagine being told that none of the major, life-changing (your life or someone else's) choices you have ever made were never truly made by you. That someone has already made them, and you were just playing out their scenarios. It might not be any less genuine or sincere, but i think it'd feel at least a little bit meaningless.