Upward tension and bottom gravity cancel each other out, it's not into the information propagates to the bottom that the result is positive and it falls. If you take a really long stick like a 10 miles long and place it in space, and then push on one end, the other end doesn't move instantly, it takes time for the wave to reach the end.

Understanding simple physics would make you not use it as an explanation for a flat earth.

When you go stand on a scale and weigh yourself, that's in relation to the earth's body which is gravity, If the earth wasn't here, and you were in the middle of the void/space there would be no weight. Other examples is airplane zero gravity experiences they do on Earth, where the air pilot puts the airplane in a temporary nosedive towards the ground then swing upwards, creating 0-G where you can float for 15 seconds. If Gravity didn't exist, then why would you float for no reason? Water bubbles become a sphere floating, and so on.