Well, yes there is because they're uniquely addictive, and encourage over-eating. While it's hard to over-eat on just high fat and protein - you feel full quickly and don't get those "snacking" urges between meals, you do with carbs, especially wheat. For a person with a healthy metabolism that hasn't been damaged, indeed you can consume a fair number of carbs. The problem is that so many of us no longer have such a metabolism due to the vast over-consumption of carbs (fructose is probably one of the main gotchas, along with wheat). Our bodies now react rather differently to carb intake.
"we're taking in more calories then we're using... and thus getting fat" - to say that helps not at all. What we need to know is "why" - why are our bodies that normally self-regulate so well, getting our energy consumption so wrong. Address that issue, and you'll get to the bottom of things quickly.