False, any theory is a theory of science if it is based upon observation and recording of events. The big bang is based upon cosmic background radiation, expanding mass, redshifting of electromagnetic radiation, mathematics,
and the observed expansion as well as laws of gravity all utilizing computers, long baseline interferometry observing deep space objects that emit radio waves etc etc.. It is science. All the science appears consistent with an initial singularity
of all known matter and energy in the universe. It is a scientific theory, not a hunch, or religion or goofy astral projection of man.
The problem, Mic, is that science does not have all the answers; does not know for sure that all the answers it supposedly has, are correct, and has no idea of how far away from all the correct answers it is.
Keep this in mind...the knowledge that there are any other galaxies (other than our collection of stars) in this universe of ours...IS ALMOST BRAND NEW. It was a "fact" discovered only 10 years before I was born. In fact, in some of the "science" books that were still in use when I was in school...referred to some galaxies as nebulae...and were thought to be phenomena WITHIN OUR GALAXY.
It is more than adequate to say, "The notion of gods seems to be a product of fear of the unknown...and the notion of a god like the god of Abraham seems closer to Alice in Wonderland than to any current science book."
That further step to "There are no gods" is not only unnecessary, but is transformative. It takes the non-theist narrative from reasonable...to "just another guess...one in the opposite direction from that of the theists."
Really!