I am at a loss for words. Which doesn't happen very often.
No wait, I'm not.
You can't be serious, mate. You're complaining because there's crunch included in the Jericho Reach, and it shouldn't be there? Or that there's a book about the background setting which you have to buy but don't want to buy? That there is crunch that you need and fluff that you don't need, and you have to pay money for it all?
Well, you can relax because, hark my words: you don't have to buy anything! And you don't need any books besides the Core Rules! And if you don't want a specific supplement, it is perfectly within your rights to actively not buy it! Amazing, isn't it.
I for my part appreciate the way FFG handles these things, because to me it makes sense. There's a book about the Jericho Reach with fluff and crunch about the Jericho Reach. If it's not your Jericho Reach, then you probably won't need the book.
There's an entire book full of monster stats, and it is called Mark of the Xenos. Go get it.
And forgodssake come back down to Earth, ok? This discussion progressed to a level of silliness that's not even funny anymore.