The reason some people need Jesus to be just a man is in the scripture (paraphrase)
7 Who in the days of his flesh, when he had offered up prayers and supplications with strong crying and tears unto him that was able to save him from death, and was heard in that he feared;
8 Though he were a Son, yet learned he obedience by the things which he suffered;
9 And being made perfect, he became the author of eternal salvation unto all them that obey him;
The key words are suffering and obedience.
We know there is no greater suffering than the imagined and the self-inflicted suffering of those who feel their key separation doctrines (that which differs one exclusivist from another, e.g. ministry, sabbath, woman's hair) are obedience to God.
