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Change in energy = Work = Force (dot) Distance
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But the work formula doesn't cut it. It doesn't even take into account that the force being applied could have ripped apart atomic bindings and the likes( which means that *some work* has definitely been done, regardless of what the formula says ) even if the object wasn't actually moved.
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No movement means no transfer of kinetic energy regardless of the force applied.
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Gravity does generate movement, and accelerates/decelerates other objects, without tiring.
But what's the difference between saying what you're saying, and saying that kinetic energy is always being transfered, it's just going elsewhere? If you're far away in space and you push something, then accoding to the work formula, work is *always* being done, because away from gravity even the smallest amount of force exerted on an object will get it to move. Agreed?
Let's not forget that kinetic energy is really *all energy*. Even the heat and sweat of your body when doing work is at base kinetic energy. For that matter, heat *is* kinetic energy; the hotter it is, the faster the particles move, the more kinetic energy they have. The work formula only takes into account work done on a visible level, it doesn't take into account work done on an atomic, or even smaller, level.