I've already said it but I'm still unsure if Withers were that much of a threat in the past
Assuming the loot we get in Nether Fortresses and End Cities were from humans before us, I don't know exactly how they wouldn't be able to defeat a Wither. I can imagine some explanations like Wither's strength in lore not being 1:1 with their in-game strength, older Withers being bigger and harder to kill than what we know currently or even that it was spawned merely by accident which could also mean there were more than one Wither at the time
Honestly, it could be all of these but something still doesn't fully fit in my mind and I can't really point my finger to what's bothering me. I mean, we kinda have some confirmation of Withers being a threat at some point with disc 5 but I don't exactly know if it/they're The Big Bad
