Everyone should be skeptical about “rebooting” a franchise that’s just ten years old. I was among them, but when I heard that Andrew Garfield was donning the skin-tight suit, I began to hope. I wasn’t expecting Avengers-level fireworks, but as someone who got a “meh” feeling from all the previous Spiders, I have to say that if nothing else, The Amazing Spider-Man manages to justify its existence.