Would be interesting experiment to suspend a spoon inside a large glass vacuum flask, then play water over back of spoon then see what happens?
Think no one theory explains lift, they all do.
I also noted one day a good example of the venturi effect whilst standing next to a canal near a bridge.
The canal narrows to pass under bridge and leaves floating on the surface speeded up as they passed under the bridge and slowed down on the other side as the canal widened.
Also the QEII had a problem some years back where it travelled fast off the US coast and scrapped its bottom in shallow sea.
Theory was that the bottom got sucked down and hit some rocks that it should have easily sailed past.