aspergillus is a pernicious, clinically significant type of fungus. However, it's also ubiquitous and symbiotic in soil. That's a disease you wouldn't focus effort to get rid of as looser, more bleached out soil likely has downstream effects. The same way you wouldn't want to bother trying to rid your microbiome of Clostridioides difficile, an opportunistic pathogen that only goes bad when your immune system is weakened

90% of medicine is just managing the sicknesses people get from material inequality
no inequality and people basically don't get sick. Some exceptions but yea