Something I often wonder is where is the player from? How'd they come into existence? So here's a little idea:
So, we know that the player and zombies are very similar looking. And zombies can be cured with a weakness potion and golden apple. The illagers are also hostile to the player, so maybe there's something here? The player also seems to be immune to the zombie disease, even being fine after spending a long time in the Nether (the idea of the zombie disease being from the Nether is from one of Retro's deepdives) so maybe there's something there as well? Here's an idea:
What if the illagers were making experiments on zombies, as they seem to be quite knowledgeable. So perhaps they cured a zombie (the player) and somehow used magic to make them immune to the zombie disease. Then eventually the player escaped and got far away, but needed resources, leading to when you first load up a world.