Long before the ‘Theory of Gravity’ was a glimmer in Newton’s imagination, the natural physics of Density & Buoyancy already perfectly explained why apples fall down. Quite simply; objects fall or rise, based on their relative density to the medium surrounding them. Apples fall because they are denser than the air, while helium balloons rise because they are lighter. No ‘Gravity’ necessary.
Everything seeks its relative density and rises or falls until settling accordingly. This has absolutely nothing to do with ‘Gravity’. ‘Gravity’ is a hypothetical magnetic-like force to help explain the Heliocentric Theory of the universe. To claim the existence of a physical law, without a single practical evidential example is here-say, not science.
How is it that ‘Gravity’ is so strong that it can hold all the oceans and people stuck to the underside of the ball earth, yet so weak that it allows birds, bugs, and balloons, to casually evade it’s downward pulling force?
‘Gravity’ both metaphorically, and quite literally, just does not hold any water. Not as a sound theory of cosmology, and not as law supposedly responsible for holding in the worlds oceans.