Seeker of truth may find life fulfillment according to the truth of the Quran. But where the lovers of rituals go, if they don’t go to Haj solely for sleeping on sand, shave their head, sacrifice goat and stone the Satan and return accomplished. Though rituals may be man-made, anti-intellectual per Quran, but the nature itself has instilled spiritual satisfaction in observing rituals, and guilt in neglecting it. A recent empirical study in Anthropology in Oxford demonstrates that ritual impulses are part of most basic ways how human mind works, rituals have always been and will always be part of human life.
Though it does not prove that rituals are part of the divine path but it does serve spiritual satisfaction. Most Muslims life is ingrained in rituals, like the rapid rise in the number of mosques and the number of Hajis visiting Makkah are its testimony. Because rituals are so satisfaction filled.
This is not to deflate your statement but to show - the world as is and the world ought to be!