Unfortunately, though, amor fati is just not “easy like Sunday morning.” Between ordinary people and what you refer to as “the greatness of amor fati” is the nontrivial factum of pervasive nihilism. To overcome empty willing, in order to really say “Yes! to life, (since the will would rather will nothing than not will) Nietzsche thought that nihilism must somehow be overcome. See “How the True World Became a Fable,” in Twilight of the Idols…see “On Aesthetic Ideals” from the Genealogy of Morals. Because Übergang ist Untergang, one must first go down if one wants to go over. This is why he sets the bar so high, in attempting to think the most dreadful thought of eternal recurrence —Incipit Zarathustra.