No, it's about GPs not wanting to waste their budget sending people who are statistically unlikely to have cancer up the the hospital for x-rays and blood tests when they know that most cases will come back clear and it'll be a waste of the national health budget.
Yet, I personally know (in my family, friends, and extended family) almost a dozen people whose cancer symptoms were written off by the GP as "nothing to worry about" and they were later diagnosed as a much more advanced stage.
Yet, my aunt a hospital nurse for 4 decades disagrees with the GPs' cavalier approach in the UK.
She was literally on her knees begging the GP to send her husband for a simple chest x-ray and basic blood tests cos she knew from decades of experience something was seriously wrong. The GP reluctantly agreed. It turned out to be lymphoma. He got lucky.
With my friend's lung cancer, the professor doing his 10 year case study, shook his head in shame when he heard the symptoms the UK GP had ignored for years. He'd had cancer in the lung for 5 years before being diagnosed and it was a simple routine chest x-ray (in Thailand, no less) that showed something wrong and started the investigation.
The GPs just don't like sending patients to the hospital and wasting money. I know a lady who had a heart attack for 5 days and during that time she went to the GP twice who said it was just her asthma and maybe a chest infection, gave her antibiotics. 5 days later she was in the ER, heart failure. The cardiologist there said it could have all be different for her had the GP been more proactive.
The doctors in hospitals have a very different mentality than GPs in countries with socialist healthcare and it is ironically to do with money. The GP, as the primary care doctor, has a budget or quota that is affected every time they send someone up to the hospital. They worry about that and they use statistical probabilities to decide who to send.
It ain't about you being exposed to harmful radiation from x-rays. It ain't like you'd realistically be going up to the hospital ever week for screenings. Maybe an extra few in a lifetime (in the latter half of your life).