The degree of unawareness you claim . .
. . is way beyond that of construction workers, tractor mechanics and big rig drivers (except maybe in the South), so I can give it no credence.
We are all dealt unequal hands and have to play them as dealt. If you got an overly sensitive colon, it would make sense to take note and be careful, not to blame "evil corporate capitalists" for wrecking it. A lot of people eat a lot of stuff at fast food joints, and I don't here 'em bitching about their colons.
No one can take responsibility for you except yourself. That's just the way it works. You need to stand up, fess up and clean up, or accept the consequences without bitching - or do you expect one day to stand in judgement and say, "Huh? What do you mean? Jesus is supposed to take care of all that stuff isn't he?".
