It's TV. Star Trek doesn't always portray things as realistic.
It seems that gravity plating is a very stable system that doesn't break down very often, if at all on Starfleet ships. So presumablely whomever designed 24th Century starships thinks safety latches aren't needed. I can only think of twice that gravity plating is mentioned or shown at work.
- When Archer was showering & the grav plating went off line in the episode Unexpected
- In the Mirror Universe, Jonathan Archer orders the grav plating turned up to incapacitate a Gorn aboard the Constitution class USS Defiant. TrekFan1984 Ends (talk) 18:32, May 30, 2016 (UTC)
Obviously, these ships are designed to fit the narrative. Why else would the Enterprise-E have a bottomless pit of doom four decks below where the keel is supposed to be? Or a docking hatch that only comes up to someone's waist? Why does Turboshaft 3 on the -A have 78 decks that seem to count up instead of down? Why is Deflector control on the -B situated on a catwalk requiring several ladders and ricketty gantries to reach? Why do crew use the turbolift to reach Engineering on the Defiant when it has ladder access directly aft of the bridge? Why does the Enterprise in the new movies have windows that would have to be two decks high at the implied scale? Or what appears to be a steam propulsion plant as a warp reactor? Sometimes you just have to suspend disbelief for the sake of the plot.-Cpthunt (talk) 06:52, June 2, 2016 (UTC)