"A star is born when atoms of light elements are squeezed under enough pressure for their nuclei to undergo fusion."
How is a star born?
How do you get such a weak force as gravity to gather
enough gas together in space, with nothing to constrain
it, and put it under enough pressure to make it collapse
into a gas planet, much less a star?
The most basic gas equations tell you it's impossible.
Star Formation
And it only gets worse. Early in big bang time, all the
matter and energy were travelling apart from each other
at nearly the speed of light. There is no way they got close
enough for gravity to affect them. So, where did the early
stars come from?