Believing in bigfoot is seen as ridiculous because it's a very uncommon belief that's contrary to what mainstream science teaches... so it's weird for a flat-Earther to use "this is like saying you've seen bigfoot" as if it's a diss.
Well, that makes two of us giving up on repeating ourselves.
Since causing things to move is one of the defining properties of a force, and you said "density causes objects to rise and fall, not gravity", it's you who said density needed to be a force.
You obviously have no idea what "devil's advocate" means.
If I wanted a debate that involved actual research, I'd debate people with more plausible beliefs than flat-Earthers, who have some chance of actually proving me wrong - like Marxists or Young Earth Creationists. Or people who think Bigfoot is real.
RE: Question : At what height do we see curvature