Can't explain dark matter? Maybe because the space we think it should fill....isn't there.

Post from another thread, but finally found a way explain what I was trying to get at, believe this is worth starting a new discussion over:

Imagine two girls swinging a skipping rope in an arc to match one another. As it leaves one to reach the other it expands, but there is still nothing inside the arc. If a ship drew a straight line and tried to sail along it, the ship would not achieve the straight line, that took some comprehending down the years when we thought the world was flat. The reason we look for dark matter is because we believe the 'unaccounted space' exists. But maybe it doesn't. Through simple astrodynamics we can establish that if we accelerate when we are directly opposite the target we wish to reach, we will crash into earth. We see a direct volume between us and a target, because that is how we are trained to think. Ok so what if, going back to the skipping rope, nothing actually exists within it. That's the elusive dark matter, that 'space' actually isn't there. Matter simply expands from one planet to the next along the 'skipping rope' path, expanding but leaving an 85% void. It just isn't there. we think it should be because we think a volume exists between us and another object like a pipe, because that makes sense, but it just isn't there. All that is there is arcs expanding and compressing between masses. No one can explain dark matter, this would fully explain it. Its not there, because that space isn't there.