Why is cocoons that produces a live silk moth useless?

Cocoons that produce live silk moths are considered useless for silk production because the emergence of the moths compromises the integrity of the silk thread. When the moths break free from the cocoon, they create holes and frayed ends in the silk fibers, rendering the material less valuable and unsuitable for high-quality textile production. Additionally, the process of harvesting silk typically involves killing the pupa before it emerges, ensuring the integrity of the silk strand. Thus, cocoons that yield live moths do not meet the economic demands of the silk industry.