Why do weed whackers/weed eaters often use plastic string and not metal wire?

Question

Why do weed whackers/weed eaters often use plastic string and not metal wire?

In: Other

Answer 1

My cheap ebay one came with 2 types of blade- 1, the little white plastic rotor that breaks instantly if you touch anything and 2, a literal circular saw blade. “We have only 2 modes here, ineffectual and horrifying”