In general, we are not wired correctly to deal with concepts outside of our immediate neighborhood.
You can say with confidence that there are 3 people in a room. Or about 20. Or roughly 100-200-300. Or a lot. A stadium filled with 10,000 people is not different from one filled with 100,000 people - for someone who sees them for the first time.
A million times bigger does not mean anything. What is a hair x 1M? No idea.
I am an ex-physicist and I leaned to just look at the numbers and compare them when needed. 10^-18 is fine for something because I learned that but I cannot imagine it. Same for 10^23.
This is also the reason why homeopathy does not sound bad to people when it is written 100 CH on the bottle. 100 looks good. It is a 10^-100 dilution ratio.
What people are afraid of is what they're told to be afraid of.
Maybe if we linked oil to fuel bombs or other explosives we'd get more headway.