Beats me....I wouldn't eat french fries made at home either. Maybe baked
ones but then they wouldn't be french fries would they?
There's a much bigger picture here than just french fries. The air we
breathe, the water that comes out of our taps, the processed to death food
most of us eat, the phalates in a lot of the plastics out there, personal
care products and cosmetics that are loaded with toxic ingredients, toxic
building materials, carpeting etc. There are alternative things we can
use instead for most of these things. The air we breathe might be a
toughie except in your own home, but the rest have safer alternatives.
It's a choice people can make.

We still manage to have a much longer life expectancy than our ancestors who
didn't have those things. Are you aware that people who still live a
primitive lifestyle (such as tribespeople in remote areas) without any of
those 'hazards' don't live much longer than 40?

Obsessing about all the things that can be bad for you is a lot more
unhealthy than smoking & eating fries. We're still going to die, regardless
of how much we avoid all those 'hazards' around us, so we might as well
enjoy our time here instead of living in constant fear.