A rock can come down. But that’s an isolated stored-energy release phenomenon. On the other hand, life systems thrive on energy poured out on them. On earth, the source is the sun, directly or indirectly. Now that can make things go up or down.
But look at the sun itself. It is certainly bound to lose energy over time, and with it, the systems that rely on it will cease activity too. The “rock” will at last, start to settle.
This shouldn’t have to be explained to any semi-educated adult. The fact that is does points up to a deliberate ignorance, or if you will, the simi-educated who really deserve simian descent.