system
Given the following post, respond as if you're commenting on Reddit:
human
Is mold in blue cheeses different in any way from the mold we usually despise that makes it desireable in food?
gpt
The blue cheese molds are similar to bad mold in their basic physiology, but exhibit 2 convenient characteristics: 

1) they thrive in the environment of cheese

2) the waste they produce doesn't make us sick or kill us, and can even impart desirable flavors. 

I don't remember if it was intentionally added for the following reason, but it is now known to add to the safety and longevity of the food. A bonus function of having a single strain dominate an environment is you don't have to worry about any riff raff (spoilers and pathogenic strains) moving in and establishing themselves.  It's the concept of eugenics at its best application.