We may have led an adventurous life a few thousand years ago but the mysteries of the universe remained boundless and uncountable. There's always something new to discover.
That's why even the ones who claimed themselves wise and full of wisdom wouldn't confidently say that they know everything. The Universe we live in is just too vast.
For example, just the fact that Divine Rank and what lies beyond it was being gatekept by the Divine Worlds to the majority of Source Energy Beings is already a clue.
Furthermore, even if there's a possibility that I'm not the first one crazy enough to attempt reincarnation through soul freezing and rebirth, how many are privy to it?
And lastly, is there another being like me? Someone who's originally a World's Will incarnation given emotions and later on acquired a physical body?