I have learned than many cases of cancer can be prevented by modifiable risk factors-- such as tobocco, alcohol, physical activity and dietary intake. Specifically with dietary intake- there are foods that are extremely high in carcinogens (such as burnt hot dogs.)
Does the average person know this? I'm not sure.
I'm wondering- if a person consumes burnt hot dogs (consistently during the summer season- not unusal in our society) and he is unaware of this information- will Hashem protect him from getting cancer? Or was it his responsibility to do proper hishtadlus for good health (and educate himself about how to maintain his health)?