Why are seatbelts so important on airplanes?

Seatbelts are crucial on aircraft because they keep passengers secured in their seats during emergencies, as demonstrated in a recent incident. The seats themselves are engineered to withstand forces many times greater than gravity - even more than what military demonstration teams like the Thunderbirds or Blue Angels experience during stunts. This robust design, combined with properly fastened seatbelts, literally saves lives during intense landing situations or turbulence by preventing passengers from being thrown around the cabin.