One relevant part that I couldn't really find in the article is that helium is so light that it escapes Earth's atmosphere when released into the air.
So any helium that is released to the air is permanently gone.
There is also no known way to synthesize helium, and it also doesn't renew itself at all on Earth.
It's also the only substance we have to cool stuff really far down. That's why e.g. MRIs depend on it.
And we put this precious, finite and often life saving substance into kids' balloons to make them bobble nicely through the air.