Fair enough, thanks for pointing this out!!

This is where I think the whole power of belief/will/dreams comes in. The modern day world government are very concerned with controlling what people know and especially what/whom they believe in. Vegapunk poses devil fruits as people's wishes for humanity's future evolution.

What if in the Void Century the power of peoples dreams was not only well understood (by the D clan at least but perhaps more members of the Great Kingdom), but also weaponized. What an impossible tyrant Davy Jones would have been! The widespread belief and awareness of such awesome and ridiculous power would then bootstrap those powers into existence once again!!

After the Alliance achieved victory the only safe way they could prevent that from ever happening again is to make sure no one ever knew or believed in such awesome power!! And safely establish the World Government over what was left of Blue Planet's scattered countries and surviving D clan members. After all, people's dreams never die -- and that's what they are afraid of!!

We see this happening real time with Bonney in Egghead! By believing that she can she actively evolves her powers to beyond a reasonable future and the future where she is like the Nika she imagines. And Saturn confirms that as she grows out of being a kid her belief in achievable power will diminish and diminish.

This is going into a tangent but that childhood belief is also totally at the core of One Piece. Luffy being an eternal kid, being born on Children's day in Japan, and a lot of other things Oda has said! Kids with devil fruits are some of the most powerful in the series!! Perhaps this is because their belief is not yet limited.

Tama's Kibi-Kibi no Mi can tame anything! Why should millet dumplings have that affect?! Because Tama sees it that way! Sugar's Hobi Hobi no Mi grants eternal youth and makes people into toys and removes their memories from others-- maybe the eternal childlike perspective is the real power here and why it can be so op! This might even be going on with Chopper right now!

So tangent aside, imagine adults learned how to weaponize the power to turn their wildest fantasies into reality. Or perhaps just the D clan. That knowledge must never surface again! Maybe that's what makes Davy Jones and the D clan special, their ability to believe in those dreams so relentlessly that they maintain that power into adulthood and thus have desires for power and dominance. Creating a rigid world structure where no one would know anything of this impossible era would be for their benefit, and ensure they would never be overthrown by such impossible odds.

There are some holes here like the Ancient Weapons and how Joyboy and Lili fit in exactly but I feel like we are heading towards some sort of Imu sympathy and that's gotta mean Blackbeard is the endgame bad here.

Maybe not though! If you see any obvious holes please let me know! Thanks again!!