In this case it's likely "dangerous" refers to the plane's danger to the pilot, not the targets of its weapons. The Harrier was notoriously unstable in its VTOL

In this case it's likely "dangerous" refers to the plane's danger to the pilot, not the targets of its weapons. The Harrier was notoriously unstable in its VTOL configuration, as it was built before adoption of fly by wire systems that could keep it stable automatically, like the F-35B does.