Yes, it is extremely surprising.
Maybe there is no such thing as 'nothing'.
The big bang cannot have come from absolutely nothing. It must have arisen within a larger metaphysical context, like within a black hole of a higher dimensional universe, or within the quantum fluctuations of a pre-existing electromagnetic field.
But then the question is just pushed back, why does that black hole within that other universe exist, or why do those pre-big bang quantum fluctuations exist?
And why did they give rise to a universe able to sustain life on at least one planet?
Maybe there are infinitely many different universes, expressing every possible mode of existence (modal realism).
If 'nothing' is an impossible existential state, then the 'why' question may have no meaning, since whatever can exist does exist within some universe with a certain set of laws.