@SailorJerry - That's so exciting about your new baby! I hope everything goes smoothly.
The short answer to your question is there is no point! It can get you all worked up. Either you get depressed because you're not dilated much (and you could still go into labor that night), or you're at three centimeters so you think you're going into labor right away... and then it goes another week.
During my last pregnancy, I actually chose not to have routine exams for just that reason. The nurse would try to give me the sheet and I would calmly decline.
Even during labor, you want to minimize vaginal exams, especially after the water has broken, because it increases the risk of infection. (By the way, I think it's just a vaginal exam that they do - I think a pelvic exam, from reading the article, is the full-on thing they do at your annual checkup. The exam in late pregnancy and in labor does not involve palpating the abdomen/ovaries, for instance.)