It's free real estate
TOS came out at a time when people still talked of Columbus discovering america.
which makes no sense, because even then, we knew Columbus wasnโ€™t the first person there.
So I suppose Star Treck are just the Colombus of space
Yes? the whole show is based on naval exploration, mercantilism, colonialism. That is why they have that whistle when an officer enters the ship, that is why there are no seatbelts.

Iโ€™ve seen a lot of far-fetched arguments over the years, but Iโ€™ve never seen anyone tie together mercantilism and seatbelts.

I have to say I do like the cut of your jib, sir.

Because even in a tea clipper there would be no needs for seatbelts, and seriously, a red alert should also mean โ€œBuckle upโ€. no more flying round the bridge at every torpedo hit, and how much voltage goes though those terminals? they should not explode, put some breakers maybe!!!