So many guidelines and recommendations

It can be confusing. We've all been told that early detection is the key to prevention. Get an exam every year! Catch it before it spreads! Now, in one week, women have been told that they only need to have a mammogram every two years and a Pap test for cervical cancer every two years after the age of 21. Both guidelines were every year. People are comfortable with that. If someone says "I didn't have my annual", people gasp. Now women are being told not to worry, get screened every other year and you'll be at no greater risk. Women I've talked to don't buy it. After being told over and over and over again to be screened every year, now they're told it's not necessary. Please note that all of the new guidelines involve women. Health experts know not to bother with men because we're famous for not going to the doctor for anything. That's a trait that doctors don't recommend.