I think you give the original too much credit. A lot could be questioned about Alien.
- Not listening to Ripley regarding bringing the alien on board the ship.
- Blowing up the entire ship when they could have huddled into the lifeboat or sealed themselves off from the rest of the ship.
- Not detaching the cargo from the Nostromo before detonating the ship
- Going back for a cat
- Trying to square off against a hostile alien that they know nothing about rather than just locking down the ship or everyone getting in the lifeboat.
- Exploring the [engineer] ship. It was clearly alien and beyond the normal scope of work for the space truckers. Leave it for someone else (or for Weyland-Yutani to send colonists to their deaths by finding it).
I think the core of the stupidity in these movies lies in the lengths the company goes to get what they want.
But all those "questions" have logical answers that actually lie in the movie itself. Unlike Prometheus or any other film the franchise.
1. They didn't know it was a deadly alien. Just some 'thing' on the guy's face. And the point was at least raised and outvoted by Ash, about not letting Kane on board (unlike Prometheus where the "brilliant scientist" takes off his helmet for no reason on a weird alien planet). And only Ash seemed to be in the loop about possible life on the planet. Now compare that to Prometheus' "scientists" choosing to believe a desire, faith, over facts and purposely exposing themselves to alien environments in spite of not knowing anything about them. The strangely large number of crashed Derelict ships (they do seem to crash a lot), the stupid, childish transformations after exposure to the black goo created only to shock but which made no sense, when exposure simply disintegrated the Engineers. The unexplained and completely boring hostility between father and daughter, the insanely dumb "scientists", the ultra angry Engineers who, despite being very advanced, seemed extraordinarily petty and hostile, the worms transforming into snakes after exposure to the goo when it disintegrates everyone else or kills humans, etc, etc, etc. None of which can be explained logically.
2. They had no idea where it was on the ship and couldn't catch/kill it. Also, see deleted scenes - they were facing a horrifying infestation and certain death. Compare that to Prometheus' endless nonsensical crap.
3. You're reaching. Really. You're dealing with a totally panicked crew, being picked off one by one by some
horrifying demon nightmare thing. The last thing they are going to be thinking about is corporate profits and saving their cargo. These are just space truckers, after all. Not some military unit used to handling hostile alien species (or ANY alien species as far as we know at this point). They aren't James Bond. Why does everyone assume everyone can spontaneously become James Bond in any situation? Again, contrast that with
everything in Prometheus. None of which has any logical explanation.
4. A display of humanity. If it was my cat I'd try to find it.
5. Again, a real reach and the question is illogical itself. Of course you'd try to exterminate a creature that invaded your ship, especially when your only option was to die by its hands or get on the small escape ship (with limited seating, 4 tubes?) and take a chance floating in the vastness of space well out of reach of civilization. Ripley was found in Aliens by sheer luck. And the ship being so vast it's hard to tell what they could "seal off" and remain safe. You're assuming a lot. Also, given the deleted scenes in the director's cut with the crew being turned into new eggs provides all the more reason to just get the Hell of Dodge and blow up the entire infested ship.
6. Ash and the corporation were behind the scenes to make sure they found out what this signal meant and get anything they could use, at the expense of the crew. The crew were required to go see what this beacon was. They found its source and took a look around. Not really illogical, especially considering it looked to be ancient and unoccupied. How many times do similar things happen in real life- you come across an old abandoned ruin in the woods while camping and take a look around. It's not illogical.
Again, you're pointing out things that have easy and logical explanations, unlike
EVERYTHING from Prometheus.
Regarding your last point- that is one thing that
is logical through all the films. All we have to do is look at today's world where corporations put profits over human health - fighting against regulations that ensure our safety, a clean environment, etc, and the "lengths the company goes to" to obtain what they want seem perfectly in line with a corrupt corporate aggressive and sociopathic form of "capitalism", which seems to be the backdrop of the Alien world.
Alien was by far a much better and smarter movie (and it wasn't particularly smart, just not profoundly dumb like Prometheus).
Sean