I can totally see your point, however I do have a few caveats to that. In reference to a hemothorax, tamponade may not be the best idea just because you want to alleviate the pressure build up in between the visceral pleura and lung. I understand the wound needs to be sealed, however better to seal it yourself and have access to the NCD sites than hope to tampanode the wound and only have access to one site right? When it comes to lung expansion, it's not as if neither lung will be functional injured side up. A needle-chest decompression should relieve much of that pressure making the injured lung potentially functional or so at least I would think. Idk, I've created this word document weighing the pros and cons of injured side up and injured side down. Take a look at it and tell me if I'm missing something please.
Sorry about the messy diagram btw. I had to convert the document into a jpeg and post it on 3 separate posts.