Some obvious examples
- the holodeck gets a fatal software error and people are stuck in a classic novel
- a shuttle breaks down and crashes into a habitable planet
- the federation loses a space battle, but thankfully there’s some space jungle (nebula, asteroid field, etc) to hide out in, thankfully within sub light distances
Bridge officers dying in space combat from being thrown off their feet and hitting their head on a panel or screen, or from debris falling on them.
I feel like wearing the slightest amount of armor (or even just a bike helmet!) into battle would have saved dozens of highly decorated ship captains, even admirals, from abrupt ends to their careers.
Or how about this…harnesses!
I guess a Ralph Nader sort never existed in the Star Trek timeline.
I laughed for a solid minute when I watched the Orville pilot episode and seatbelts were (a) used appropriately and (b) solved an immediate crisis.