Even so, crushing those decks would've busted the containment systems in the anti-matter storage pods and the warp core.The Enterprise should have attempted everything to stop the Vengeance from crashing on Earth for one simple reason: antimatter. They just got lucky that it didn't ignite.
I've always wondered why Voyager also didn't immediately blow up upon crashing in "Timeless" either, since six of her lowermost decks were said to have been compacted into one upon said crash landing, meaning the warpcore would have been completely destroyed.
Well Voyager was built to land on planets. Might be that those decks have been constructed with extra reinforcements.
I think the writers just forget that the ship uses anti-matter and would turn into a bomb if it crashed.