Earth's fixed helium came from trapped helium from earlier stages of
evolution, when it mixed in with the natural gas (methane) and other
hydrocarbons when they were forming.
The new helium on Earth produced now is from radioactive decay.
This means there is:
1. Fixed helium from earlier stages of evolution that has always been on Earth.
2. New helium produced from radioactive decay.
The vast majority of helium extracted from the Earth is from the first
source, the second source is what the dogmatists claim the helium came
from, but that is irrational. Irrationality is accepted though, as long as you accept and teach the party line. In a sense academics are like communists, they have no tolerance for new ideas that challenge their worldview.