What is this issue with pelvic exams?

Why do women get told different things when it comes to the age of having pelvic exams? Some medical practitioners say the age should be 13-15, others say around 18, others say around 21, and others in the UK say 25. Cervical cancer is still rare, and yet the medical industry seems obsessed with having young women have regular examinations. I also question why it was the male doctors that invented these exams in the 1800's. There are things like colon cancers that are very common compared to cervical cancer. All this hogwash, phony baloney pig slop at how women 18, or even younger should have regular pelvic exams. Bull****