So gotcha number 1: My backstory begins with the notion a DM says, "Let's play D&D" not "I'm running Curse of Strahd". You let me know you're running an AP; I'll make my origin fit a little better with the AP.
THAT SAID
If my background will never have bearing on the game, I simply won't have a background. I can play a murderhobo whose family was murdered just as easily as I can play a character with a fleshed-out genealogy. But I will return the favor: your world's history and lore will mean nothing to my PC. If you expect me to care about your world, I expect you to care about my character.
Sadly, these bullets make me believe I was right. You assume the worst of your players and any attempt to wrest even a modicum of agency from the DM is tantamount to a coup attempt. Rather than reward a player for engaging with your world and providing plot hooks, you assume I am some Mary Sue trying to make the game all about my own story.
I spent too many years playing under antagonistic DMs who believed their stories were great and we were privileged to be hearing them, often times to the point our characters were inconsequential. They didn't care if our PCs had goals, ideals, desires, families, or I swear-to-god names, they just were there so we could bask in the glory of their game. I have grown to desire games where my character's place in the world matters.
Gotcha #2: Without knowledge of your Chargen rules, I assumed a bog-standard D&D world. Running Eberron might change the details (replace dragon with Daelkyr, for example). Doesn't change the scenario.
Too late. And I already do DM 50% of the time.
This is The Way.
My current game is set in Ravenloft and consists of six PCs, all from different domains, who are assisting a mysterious library. Despite this, each has their own goal: to stop the vampire who partially turned the dhampir, to recover a lost love through mad science, to learn the origin of their creation, to escape the hag that has been hunting them since birth, etc. Each gets their own mini arc in the overall narrative along with the main arc. Each gets a storyline to be the main draw, and in return they get to see the other PCs also get their day in... (Well, sun doesn't seem appropriate for Ravenloft, now does it?) They enjoy the story laid out and still feel like they created a part of it. They are connected, their choices mattered even before the game started.