fear of

we are not fear of something or somebody.

we are fear of the consequence when something exist or what somebody does.

we are not fear of height but fall.
we are not fear of darkness but alone.
we are not fear of a mad man but his aggressive act.

So,

in prevention, we are not prevent something or somebody, but just prevent the consequence and behaviour.

in scolding, we are scolding the consequence or the behaviour but not the something or somebody.