TYou are right! The vast majority of cervical cancers are now thought to be caused by a virus that is sexually transmitted. If you are in a monogamous relationship with both partners remaining faithful, or practicing safe sex if you have more than one partner, technically you should be fine. But the truth is, we don't know if the virus can/does remain latent and there may be other factors as well. Your best defense is to remain a virgin your entire life.
I am not advocating either system. I don't think either is a one-size-fits all methodology. I'm just saying that the majority of cases that I sign out as abnormal are mild, easily treatable cases. I see a handful of more severe, but still treatable cases regularly. Invasive cases are so rare that when someone in the office finds one, it is usually passed around so we don't forget what cancer looks like! The patients who come in regularly (1-3 years) are the ones who have things caught. The invasive ones are usually older patients with no listed history.
I see what you are saying Sheril, and I don't disagree. But I do know that there is no perfect system when you're trying to balance costs vs. patient care. The fact that the UK is switching to liquid based preparations will not help the NHS with costs either as both private companies that exist charge a LOT for their supplies/machines. Does it make reading the slides easier/more accurate? Maybe, maybe not. But here in the US, the difference between what the lab can bill an insurance company for a conventional smear vs a machine processed, liquid based smear is amazing! The last I heard, it was about $20 for a conventional smear made by the doc, and $70+ for a liquid based prep. Factor that out over the number of women getting smears each year and you can see why places with socialized medicine are looking for ways to trim costs.
This is only a tiny slice of the issues facing medicine and how it is practiced worldwide. We as human beings need to face some tough questions about who will be treated and how.