Simply, there's better alternatives to Cloth Wire.
Cloth wire is not a good conductor of electricity because it has air in its fibers. The space between the fibers and cloth allows electricity to flow through the air instead of the cloth, so there isn't much electricity going through the wires as a result.
Electrical wire is made of metal, which conducts electricity really well. There are different kinds of metals that conduct electricity differently. Copper is the best at conducting electricity. Aluminum and silver are pretty good too. Steel isn't very good at it though. Plastic is not a conductor either, but it's better than cloth.
Wires that are made of cloth can become brittle and break from excessive use. The wire becomes weak, and then it breaks. This happens when the wire is used for a long time.