Think about it, nobody knows who invented the ability to control fire, and yet it is still, by far, the most important technology in our lives. The largest economic sector is oil and gas, in other words, finding things to set on fire. All of our technology is powered by electricity, which is still predominantly generated by setting things on fire. Rockets are powered by fire. Guns are powered by fire. Cars are mostly powered by fire. Even if we switch to renewable, GHG-neutral sources of energy, that is only possible because of millennia of fire. Hell, we only evolved big brains in the first place because we unlocked tons of extra nutrients by cooking with fire.
All of these were probably also invented independently by multiple people, because whenever one human culture has made first contact with another human culture, they typically have many of these things already.
For example, the inhabitants of North Sentinel Island, one of the last uncontacted peoples in the world, have bows and arrows. Also, they tend to use those bows to shoot arrows at everyone who attempts to approach North Sentinel Island, which is why they remain one of the last uncontacted peoples in the world. Other examples include American Indians, some of whom, like the Comanche, were able to use bows effectively enough to consistently defeat Westerners well into the 19th century.
It's also interesting that not all of these inventions are universal--for example, the Inca civilization did not have wheels, because the Andes are too rugged for wheeled transportation to make sense. But they had lots of other things and fairly advanced mathematics, which was important because they had a relatively advanced mercantile culture where goods were traded by means of pack animal.
The invention of the bow predates mans immigration from Africa so isolated tribates having access to it doesnt mean that they invented it independently. And fire is even older.
I'm not sure what the parent was referencing, but at the very least the Polynesian cultures record a story[1] of man learning to make fire from birds. It's possible this oral tradition has its foundations in an actual event from pre-history.
Think about it, nobody knows who invented the ability to control fire, and yet it is still, by far, the most important technology in our lives. The largest economic sector is oil and gas, in other words, finding things to set on fire. All of our technology is powered by electricity, which is still predominantly generated by setting things on fire. Rockets are powered by fire. Guns are powered by fire. Cars are mostly powered by fire. Even if we switch to renewable, GHG-neutral sources of energy, that is only possible because of millennia of fire. Hell, we only evolved big brains in the first place because we unlocked tons of extra nutrients by cooking with fire.