We just don't have a very good definition of what "intelligence" actually is. Hence we're trying to set the bar somewhere. "Surely a machine that can play chess

We just don't have a very good definition of what "intelligence" actually is. Hence we're trying to set the bar somewhere. "Surely a machine that can play chess is intelligent". Nope, that's not it. "But surely a machine that recognizes objects in images is intelligent". Nah, it's just good at recognizing patterns of pixels. And so on and so forth. It's a noisy process, but we're slowly moving in the right direction.