I find it difficult to believe that you've never seen an argument that the patents are invalid. You may not agree, but the argument has been made many times. The usual argument is that the patents are obvious. Bouncy scrolling, double tap to zoom, pinch to zoom and one fingered scrolling. Do you find these non-trivial and non-obvious? You mentioned that ideas are not patentable, but in practice that is exactly what is protected - the fact that a machine implementing them is technically what is patented makes little practical difference.