Explain the attractive mechanism: how do four trillion billion liters of water adhere to the outer surface of a sphere?
How about you explain why it shouldn't first?
What magic is trying to rip it away from the surface of Earth?
Unless you can do so, your globe reality is really just a poorly written SF story.
Pure garbage.
Nothing works like that.
Not being able to explain everything doesn't mean that everything is a poorly written SF story.
We don't need to know how the water stays on Earth to know without any sane doubt that Earth is round.
That nonsense is like saying unless you can explain, with perfect accuracy, how a letter ended up in your letterbox, it must be fake.
That if you can't explain, with perfect accuracy, how a computer works, they must be pure fiction.
In order for it to even approach a rational argument against reality, that is against Earth being round, you would need to provide an alternative explanation which works for your Fantasy Earth.
But you make no attempt to.
Please explain how gravitational waves with no quanta (particles) can attract each other or even interact with one another.
How does a gravitational wave emitted by a water molecule from the English Channel interact with a gravitational wave released by the iron/nickel core?
And there you go showing yet again, that you clearly have no idea how anything works.
Like I explained to you before, it wouldn't be a gravitational wave nor a graviton emitted from Earth interacting with one emitted from a water molecule.
Instead it would be the gravitational wave/field/graviton interacting with the water molecule.
Terrestrial gravity might be force of pressure.
Yes, the magical aether, like I point out below.
That still "works" to explain why the water remains in place, and still produces gravity.
But it likewise raises a bunch of questions, which unlike gravity with an unknown mechanism would cause sane people to reject it.
The most important one is how the magical aether produces a force proportional to the mass, and why it isn't based upon area at all.
If it was a simple pressure, it should act in all directions, to crush the object, not accelerate it in a particular direction and should depend upon the area of the object, with the total mass being irrelevant.
So instead they need to appeal to a pressure gradient, which then raises the question of what causes this gradient, and why it always appears to be directed away from other objects, and it still leaves open the question of why it is based upon mass. A pressure gradient produces a force proportional to the volume, not the mass.
So instead of being an explanation is just raises more and more questions and really provides nothing.
But the same applies to all fundamental forces and all explanations, regardless of how far you provide an explanation for, there will always be one more step.
Again, we have been down this rabbit hole before, with you failing to explain your nonsense and then fleeing because you can't.
The simple fact gravity is real, it is directly observable in the lab. It is known that masses attract other masses with a force proportional to the product of the masses and inversely proportional to the distance between them squared. This has been empirically verified.
It is only the underlying mechanism that is in question.
Some are happy to just leave it as a gravitational field, like an electrical field.
Some go full crazy and appeal to a magical aether with magic pressure and all that nonsense.
So far the best explanation is that matter bends space time, with the resulting curvature resulting in an apparent acceleration of any object towards the mass.
It is then this curved spacetime that keeps water on the surface of Earth. This is the best because it directly explains why inertial mass and gravitational mass are equal; because gravity, rather than being an actual force that acts on an object is instead a distortion of space time, with the object following a geodesic in space time, with the apparent force being an inertial force, with inertial forces always being proportional to the mass of the object. That means it actually explains a key part of it, unlike the other "explanations".
But regardless of what explanation of the underlying mechanism, there are still more questions. How is this field created? How does the aether magically push objects? How does matter bend spacetime? And when you provide an explanation for that, it will just raise another question needing an explanation.
But the simple fact is, there is something that exists which results in objects falling towards Earth.
This is what keeps the water in place.