Astrology isn't a fact.
I find it interesting you say that, and forgot to omit your line about not accepting an answer based on 'DET', I've only seen a little about that, but there's about as much proof as there is for your round earth.
FET isn't a fact either. So, where does it gets us?
Wrong.
Nope. You're wrong.
We have over 2000 years of evidence to back up a round Earth model. We had mathematical proofs, we had physical experiments, people have observed the effects one sees on a round Earth. At this point, a round Earth isn't a "theory". It's a fact.
The flat Earth
conspiracy "theory" has been nothing but a bunch of crazies running around, claiming the Earth is flat, and then changing their model every hundred years or so, because it doesn't work with the presented facts. This happens more often today due to even more scientific and mathematical discoveries. In short, unless you can back up your "flat Earth model" with physical, scientific, and mathematical evidence, of which I can call "falsified", "stupid", or "blasphemous" like you flat Earthers do, the flat Earth "theory" will remain as a nothing but a pretty little story. An un-ideal pretty little story at that.