On one hand, I get the idea that you feel like you invested the most into the game, therefore you get to make the calls.
On the other hand, if you are in a "traditional" family. The Father is the breadwinner and makes all the money. That does not mean he gets to dictate what food and entertainment is allowed in the house, simply because he has the biggest paycheck.
You agreed to put in that extra work. That was your choice. And using that to hold over the other people at the table is just... something I don't understand.
And, just to think through an example. I have only watched a little of Season 2 of Critical Role, but I remember that Liam O'Brian's character had a backstory involving an evil wizard syndicate training brainwashed soldiers for the empire, in secret. Do you suppose that Mercer had that organization completely built and ready to go, and just Liam who played major parts in his backstory, and that this backstory was even an option? Or do you suppose that Liam had an idea and went to Matt, and they talked through it and found not only a thing that MAtt had sketched out, but then Matt allowed Liam to add detail work and build upon it?
Thinking about season 1, there is every possibility that the country of Draconia was developed by Tiberius's player, because when I found him after he had left the show on youtube, he seemed to be working on a story titled "The Knights of Draconia" . The Asheri and the Arementai was probably developed by Marisha. Whitestone by Talisen.
And I'm not saying every DM can or should do this, but I think it is very telling that there is a middle ground. Players can world build too. This conversation very much is painting the idea that the DM does everything to make the world, and the players build characters in it, and then affect the world afterwards. But other tables let the Players assist in the worldbuilding. To collaborate with the DM. And that isn't a bad thing, and it certainly seems like something a player who is very dedicated to a passionate idea might be more than willing to do.