This is kind of like asking why do they just shit in the streets in India, while Americans use the toilet. We have proper sewage systems and know that pooping in the streets spreads disease (excluding certain places like San Francisco). Likewise, we know that leaving foods at room temp for more than 2 hours can cause harmful bacteria growth.
I bet a lot of those places that don't follow proper food preparation have higher rates of food borne illnesses. But it goes mostly unreported because no one cares that Abdul got the shits again. Or Xong Lau ate at the budget fried bat place and now he has a fever and a cough, he probably should stop eating there.
That being said, your fajitas probably won't make you sick, but is it worth the risk? When I was a kid, my family would leave pizza out overnight and eat it the next day for lunch, and I don't ever recall getting sick, but now I would just throw it in the trash. I like having solid poops.
Were also told that you need to follow expiration labels. Water, salt, and honey have expiration dates so you will buy more because you are retarded.
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