What's the use of luggage belt?

When packing and taking the plane for consignment, I am afraid that there will be too many things and the bag will be too bloated. It looks like the bag will be very big, so I wrap it tightly with packing tape or worry that it will crack or burst when loading and unloading the plane, because the staff throw the bag away instead of putting it down slowly. Generally speaking, not.

The bus should not be used.

It's the same with locks, but there are too many locks.