RE has committed to solving the 200+ body problem. One star, 8 planets, and over 190 moons.
And comets, asteroids etc, etc.
There are millions of objects in the solar system. And at a more granular level, the rings of Saturn are made up of billions of rocks, how could we begin to model that perfectly?
But, and here's the point you are collectively ignoring or not understanding - a model doesn't have to be perfect to be useful.
And a model doesn't have to be perfect to prove that the thing it's modelling is correct. Or rather, imperfections in a model doesn't mean the thing it is modelling must be wrong, it just means the model is imperfect. Einstein came along a century ago and showed that Newton's model of gravity wasn't quite right. But it's good enough for most practical purposes - it got us to the moon.
The models we have of the solar system are good enough. They've got us to the moon, they've got craft to Mars. They've got craft to fly past other planets.
Now, of course, you can say that's all faked but that's a lazy argument which you could use to dismiss anything which doesn't fit your worldview.
Meanwhile, the FE model doesn't even know what the sun is, how it's powered or how any of the planets orbit.
Now, Tom bemoans that no budget for FE research. But you might all want to think about why that is.
Why are there no flat earth astronomers?
HINT: It's the same reason there are no research budgets for alchemy...