Maybe some ideas are in fact so "settled" that anyone being seriously skeptical of them is either trolling (and not worth our time) or frighteningly unethical (and should not be in a position of power).

For example:

1) Men should be dominant over women. Women should have no rights, and be little more than property.

2) Certain races are inferior and should be put back into chattel slavery.

3) Eating toddlers is fine, actually.

Would you bother trying to counter those ideas in good faith? Or should the people expressing those views maybe be fired/punished/etc.