The paper shows some significant evidence that human coin flips are not as fair as I would have expected (plus probably a bunch of people would agree with me). There's always some probability that this happened by chance, but this is pretty low.
Of course, we should be able to build a really accurate coin flipping machine, but I never would have expected such a bias for human flippers.
This is why science is awesome and challenging your ideas is important.
Edit: hopefully this is not too wrong a place, but Lemmy is small, and I didn't know where else I could share such an exciting finding.
They don't all inherently choose to make it land on the up facing side. In fact, I believe this study is not even true. I call shenanigans.
I look forward to your article explaining how you used the scientific method to provide counter evidence to their study.