Although not ideal, one can land 4000' down a long runway and be perfectly safe.
- Safe from what? What does your Go Around requirements state in your ops manual? Continue a landing after touching down at 4000ft in my outfit and very pointed questions will be asked!
My ops manual includes a provision that does not preclude common sense, which is to say that I could, for whatever exigent circumstances, justify landing long, for example, on a 14,500' pavement as on 13R at JFK, or on a 16,000' pavement as on 16R at Denver.