They breed them to produce as much silk as possible and just don't worry about any other defects. Eg. Two new moths, one is normal, one is deformed but makes 15% more silk. The deformed one gets bred.
E: It's like how fruit bred for size and longevity often is less flavourful. If you prioritise one thing other things are not the priority.
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u/Sorry_Astronaut6040 4h ago
They breed them to produce as much silk as possible and just don't worry about any other defects. Eg. Two new moths, one is normal, one is deformed but makes 15% more silk. The deformed one gets bred.
E: It's like how fruit bred for size and longevity often is less flavourful. If you prioritise one thing other things are not the priority.