Your Extra Bags Won’t Cause The Plane To Crash
Each passenger is entitled to at least one carry-on bag during the flight. But this means that they will have to pay a high charge for any extra baggage placed in the hold. Almost all airlines do this.

Although the aircraft are designed to accommodate only one piece of luggage per passenger, your extra luggage will hardly affect the situation. Aircraft must have the correct centre of gravity to take off. Depending on the amount of checked baggage stowed on the plane, most airlines are accustomed to using sandbags to lighten the weight. However, this does not necessarily explain why airlines charge you for extra luggage, but we don’t set the rules.