What you are relying on: "The Earth rotates around the Sun."
This claim is supposed to be made independently of model. Therefore it holds for every shape of the Earth, including a flat Earth. Therefore it should be justifiable from the perspective of a flat Earth. If this is not the case then your argument is circular.
Sure, if you leave the flat Earth as nothing more than Earth being flat.
Instead what it really means is that it holds from observations rather than assuming a model with Earth with a particular shape.
When your premise for an argument against FET is that FET is false, you have a bad argument.
Do I seriously need to explain why?
No, instead you need to address what has been said.
Observations of the night sky is not simply assuming FE nonsense is false.
Not just accepting FE is not the same as assuming it is wrong.
Meanwhile your entire argument seems to boil down to "FE DOESN"T SAY THAT SO YOU CAN"T USE IT!!! WAH!!!"
Grow up. Stop assuming FE is correct to try and defend FE.
If you want to start again, don't just start with blatant misrepresentation of my position. Instead, try starting again.
We have observations of the stars and the planets in the sky. This includes their apparent and relative positions.
The majority of the stars appear to rotate as a single unit, and thus might be objects on a rotating sphere or Earth itself rotating (note: This says nothing about the shape as I am just focusing on observations from one point). I know that this goes directly against the commonly presented FE model. I don't care. Me not accepting that isn't the same as assuming it is wrong.
We can also try and figure out how they move relative to one another and doing so ends up with the best model being one in which the planets revolve around the sun, and that includes Earth.
But if you wish to ignore that then we have other aspects as well.
They can be observed with a telescope, with many even having moons, just like Earth, where the moon revolves around the planet, just like Earth's moon revolves around us, they can also be observed to rotate. Due to them remaining roughly the same size we can tell they must be very far away and thus must be large. All such large objects are observed to be round. So far everything we can see about these planets, except those which are debated, are consistent with Earth. (If you want to appeal to ignorance and rejecting the work of NASA which clearly shows Earth is round, then we haven't been there and thus can't determine if they support life or not).
In just what way are they different? Note, this would specifically be something which distinguishes all the planets from Earth, not just one planet from Earth which would also distinguish it from other planets.