This isn't a conspiracy theory. It's an obvious connecting of dots.
1) Burisma hires Hunter so they can have access to Joe Biden.
2) Burisma gets access to Joe Biden, and tells him that they need his help to get rid of the prosecutor investigating them. They inform Biden that this prosecutor is highly suspected of corruption, and that can be the excuse to demand him being fired.
3) Joe Biden, not wanting his fuckup son to be in trouble yet again, demands they fire Shokin. He uses the corruption as the reason, but that's not the actual reason he gives a shit. But it's a good cover. He holds up $1 billion in aid until they do.
4) Shokin gets fired. Mission accomplished!!!
Even if you want to say that Shokin being fired was a good thing, the way Burisma successfully used Hunter to get him to do their bidding should be alarming to anyone thinking of voting for Biden.