Pap smear and HPV self quiz

**HPV-16 is associated with 50% of cervical cancers** -->the notes say HPV-16 "causes" cervical cancers but I don't buy it, cancer is multicausal and the entire blame cannot be placed on one little virus. Not everyone with HPV-16 gets cervical cancer....so what is the difference? Not discussed here but you know I have ideas.
( just a few Q's from lab dx notes )