The US government issues patents because we the people feel that people who put time, effort, and resources into designing and making a device are entitled to exclusively reap the profits from it's sales, if any, for a time. This is done to encourage innovation, and it has served us well over the years. If a patent is issued it's government certification that the product is novel and original. The idea that the patents were somehow defective is not credible on its face.
As for the problems inherent in submitting complex technical questions to a jury of 12 schmoes off the street, it's the system Apple and Samsung have chosen to use rather than, for example, coming to some sort of agreement.
Apple was in as much danger of getting anti-Apple jurors in that venue. Apple, Inc., has tended to run roughshod over the local community when it comes to issues like taxes and so on.