why does all of this had to have happened this way?
Because some of the books are specifically referencing specific events from stories that can't have happened the way they did based on other things that have been revealed in other books, but which we are supposed to understand as based on the stories from the recent past like Brightest Day.
Like Alec Holland coming back to life, the way it's told it plays out like it was part of Brightest Day, but that can't have happened the way it did in the actual story if the JLI have never been a team.
Or Sinestro as a GL, which references War of the GLs, even though that is built off of all the GL stuff of the last few years, which can't have played out the way it did due to JLI never happening, and Wally never existing, and Jade not existing, and the JSA not existing, and a bunch of other crap.
You have to ignore those things to enjoy the book, but they go out of their way to reference the stories which just makes it a mess.