A very small percentage. Too small for a food manufacturer to make a profit by catering to their needs. Fortunately for them, there is a large and growing population of fakers in the world.
While you are right, there are distinct differences between molds and what we usually call fungi. From an article titled Fungus Vs. Mold on the Sciencing website:
“Although mold and fungus are related – the former is actually a subset of the latter – the terms cannot be used interchangeably. Each has its own distinct characteristics, features and functions. Despite the many dangers associated with molds and fungi, each also offer a surprising number of benefits to humans and ecosystems.”
I remember running through the sprinklers when I was little.