There Is No Upside Down In Space

If there is no upside down in space, why is it every time you see two ships on Star Trek, they’re all right side up. Even if it’s a Federation ship and a Romulan ship, there right side up. You never see The Enterprise approach a ship and the ship is upside down.
The more I think of the upside down thing, it makes sense.

Lets say that space ship 1 is takes off from the North Pole of earth. It’s right side up. Space ship 2 (it looks like a 5 cause it’s upside down) takes off from the South Pole of Mars. Even tough, the South Pole of Mars is on the bottom  when the ship takes off, it’s right side up cause it’s taking off from the ground. Now the ships meet in the middle of space. Both ships think they’re right side up, but when they meet, they’re opposite. One ship is upside down (even though there is no upside down).
Lets say you’re on a base, on the South Pole of Mars and you have this really big, strong telescope. Even though you’re upside down (looking from Earth) you’re right side when you’re standing on Mars. You look through the telescope and see the ship takeoff from The North Pole of Earth. Looking from Mars, that ship would be upside down.