This causes the windows to bow and give objects in the distance a curved look.
Wouldn't that cause the horizon to slope
up at the edges instead of down? For further experimentation: look at your reflection on either side of that cereal spoon, Mr. Wizard. The lens you're pretending it would form would only curve the edges down if the horizon were above the vanishing point when viewed straight out. Even if I try to help you and we presume that's the case and the plane is tilted, it still doesn't account for the people looking from the other side who would view just the opposite curvature. Good day, sir.
Now times that by the 80 or so windows and tell me how far the fuselage bows out....
Multiplying the windows affected doesn't change anything if the pressure is constant. If we DO account for the slight change in pressure, there's actually
less force acting over each area, as the total volume has increased.