This is exactly it. You control the things you can by not needlessly exposing your self to carcinogens.You may die from cancer, but why add to the chances of it needlessly? For whatever it is or isn't worth I'm a career heavy duty diesel mechanic. In the past 20 years Osha, msha and a host of other agencies have done plenty of studies on the prolonged exposure to lubricating oils and fuels. It's not hype it's facts. Same reason businesses are switching away from solvent tanks to water based cleaners, even then the waste water is considered a hazardous material. Guess we're all wrong for trying to make it to 80 instead of 65...
The simplistic thinking of some on this site is just laughable.