The future doesn't always turn out how we expected it. After Back To The Future, we all expected to be riding sick hoverboards within a decade. Instead, we got lame-ass self-balancing scooters. With wheels. We're basically the laughing stock of the 21st century. Likewise, after Pacific Rim came out, we all expected to do battle with undersea-dwelling aliens within a few years.
The truth of the future is a little more mundane than that, unfortunately. Today's undersea monsters don't come from a portal in a rift between tectonic plates, but they do come from very far down. And they might not be 3,000 pounds and be able to destroy entire cities, but they can probably take off a finger if you're not lucky. Look, just be grateful we got some monsters at all, okay?