i can understand why people only wish to desire happy conditions and pleasure states. it must come from a place of denial, away from the unhappy conditions and misery states. that seems quite a normal human condition and desire. so rejecting either idea or real place of a vajra hell is quite normal. we dont have to acknowledge it or give it much contemplation, rebirth is not essential to know or understand, the four noble truths are just statements or musings of a renunciate, and not applicable to modern life.