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

Well for one reason if you cut an electric cord with plastic you don’t create a circuit. You also don’t want to be debarking your trees, and cutting rocks in half. The metal would also still break, and then you have sharp metal bits flying around. Instead of little plastic bits.

I’m sure there are uses for a metal wire, but sounds more “professional” use.