There is another saying: throw it if you don't break it, others will think that the owner is dead. In the past, old friends' clothes were thrown directly to the river or burned as a memorial service.
Another way of saying it is to cut it and wrap it tightly before throwing it, for fear that others will be embarrassed or used abnormally.
Anyway, the reason can only be said that "words can only be understood." . . "Have faith, don't believe it's nothing. It's all psychological barriers. My clothes that are still in good condition all year round are either broken or ill.