OK so. This is science so it might be difficult for you.
In the different hemisphere (note the word sphere) water drains differently.
Why are you talking about draining?
Are you talking about rivers going from high to low or lakes doing the same thing?
Here's how it works in real life. Real science.
Water conforms to the walls of the container it is put in.
Water does not conform to the exterior of those external walls unless it sits inside another container which contains those exterior walls, as in my set up.
That's real science and water level is also real science.
What isn't real science is water staying level on a spinning ball. That's not real science, it's utter fiction.
Now. If you had a disc. This would not be possible. Because of science.
On a flat disc I agree. It would cascade off the disc if the disc had no edging. But my Earth mindset is of it not being a disc, so it's irrelevant.
Do you believe science? Empirical and not anecdotal science from your idiot mates?
Science is the Earth and everything to do with it.
If you mean, do I believe in scientists, then the answer is absolutely, yes, as long as the proof is there or the evidence is there that allows me to accept it's real scientific legitimacy.
Unfortunately it's not all scientific truth. And this is where the issue lies and why it's being questioned.
Do you understand gravity?
Nope, not in the least. There's a good reason for that. It does not exist.
You don't understand it as any reality. You just believe it's a thing because you believe in all the stuff gravity supposedly offers, like spinning balls in a space vacuum where water supposedly covers 70% of it, mostly miles deep and yet it acts like we see it, as in staying on the ball when we all know what really happens.
But magical gravity to the rescue, just like the moon and sun and ...well... you know, all the other gunk we've been forced fed.
Or........or..... can you tell me what gravity is?