It's inane because any reform that helps invalidate patents can be seen as weakening the patent system.

Notice he didn't specify whether or not it weakens strong patents, but the patent system. A good thought experiment would be to ask yourself if you think the patent system needs to be made stronger. If you don't think it needs to be made stronger then would it still work if made weaker? If neither is true, you are close to saying the system is perfect the way it is.