Should children know what a pedophile is ?

Having a huge disagreement with my husband. Our kid is 6 btw.

I think it's important that kids understand and know what a pedophile is and what to look out for. My husband thinks it's "putting unnecessary fear on a kid ". It came up because my son heard the word and asked me what it means and I'm very open and honest with him on his level of course (age appropriate explanation)and my husband got mad and said I'm going to confuse and scare him. I said it's BAD to not let them know and talk about these things that's a big reason why predators get away with things.

What do you think