I have been watching a lot of Star Trek lately and I noticed one thing that is common to all iterations of Star Trek.
The ship gets damaged by an enemy attack and the crew gets knocked around. Sometimes they just get jostled and many times the ships chief medical officer has much to do.
Then someone will say "Shields at 60 percent!"
If you have shields, why did a random panel explode?
This isn't unique to Star Trek. Almost all space faring sci-fi shows and movies have the crew get banged up when there ship is banged up.
Let's cover life support.
First off, space is generally cold. It takes a lot of power to make sure the ship is sufficiently warm. a ship up to a temperature humans can survive and thrive in. In most cases, a ship has an engine or reactor that is very hot.
You need to keep the temperature sufficiently cool to let humans survive and thrive in. Add in how common it is for ships to move from deep space to close to the surface of suns, nebulas and other things likely to be pretty hot, maintaining temperature at a survivable level has got to be really hard.
Then you add in the need for breathable air and in most shows you have some form of artificial gravity.
I would put forth the idea that if you had the technology to make Earth-like living conditions on star ships, the devices that allow this would be both very sophisticated and very delicate. A relatively small amount of damage would cause everyone to burn or freeze to death, or to depressurize the hull. This is how I imagine such a ship would take damage.
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This is how Star Trek seems to do it. They treat star ships like boats. If you are on a boat there are all sorts of ways the occupants can be tossed around while the boat or ship is mostly intact.
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Green means the ship is damaged but still functioning and your air, gravity, lack of motion sickness, and all that good stuff is still Earth-norm.
Orange is unconscious and dying in need of imminent rescue.
Yellow means you are inconvenienced or slightly injured
Red means you are dead.
But the Star Trek writers and directors NEED people to get tossed around to show the drama. Just in case someone in the audience never played a flight simulator game and didn't realize how dramatic it is to have your ship damaged when you are perfectly fine.
I think that is unrealistic. I'd be open to counterarguments if you think it makes sense that star ship passengers would be tossed around routinely.