I think they’re implying that a black hole the mass of a person has the same gravitational attraction that the person had before collapsing (negligible).

Saying they suck things in isn’t really correct, unless you want to also say that the sun is constantly sucking Earth toward it. It’s just gravity.

Also, magnets don’t only work on ferrous metals. Magnets push electrons through copper loops in generators and that’s how we have electricity.