Black spores:Indigenous or created

In the Fire and Stone series,we learn that LV-223 has become over run By black goo,causing the moon to go through radical changes in it's climate.It's first discovered during the event of Aliens,roughly 90 years after the events of Prometheus.Of course in Alien Covenant,David and maybe Shaw have been there for an average of 10 years.The spores suggest some kind of black goo contamination much like in Fire and Stone.So what if David isn't the cause of all this?What if,like in Fire and Stone,the engineers used the black goo as a sort of teraformer and the planet eventually destroyed them,not David.What David finds is a planet that has already undergone drastic changes.Perhaps he's not the creator,but is just simply using what is already there.