The problem with pulling Romans 8 out of the hat by itself. It is part of a systematic theology, and misses the first seven chapters of the system of that theology. Romans is the declaration for Christianity. To skip the why simply stops us from seeing the how.
Or, if exegesis done properly doesn't grab you at the right spot, let's take this to a legal or semantics level. (Real semantics, not the word people use when they mean they just don't want to agree.)
The first few words of the chapter are "There is therefore." "Therefore." A conjunction that tells us something happened before this.
Let's take this at a level most people can relate to. A lease for an apartment.
"There is therefore a return of deposit money at the end of this lease."
So, you're vacating your dwelling, and raise your hand for the deposit money.
The landlord tells you that you aren't getting it, so you repeat the clause above to prove you deserve it. He points to the clause before that that tells you why you don't deserve it. (Usually something about the condition of the property being equal to how you first moved in.)
"There is therefore" means something happened before that before declaring that. A lot did! Seven chapters of it for Romans 8. Seven very important chapters, but to start at 8 means let's just skip the seven. Nope! Got to face the seven, because that's what the 8th is all about.
The first seven tell what God did, and how Man screwed it up again and again, in ever way imaginable. And then Romans 8? It is what God is doing about it! Without knowing all the different ways we can, and have, screwed it up, 8 won't make sense...
Unless, it's being used to pull off a personal agenda.