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

As someone who got stung by the plastic string( fishing line), I rather get hit with the line than a possible steel wire or blade.
It stung and it did imbed with breaking the skin, if it was metal it would been much worse.