Hmm .. that is troublesome. Why?
..because 'time' is something we measure scientifically .. but it is also a philosophical construct.
For example, nobody has measured a billion years, and yet we speak about the universe having
existed for billions of years.
It is only an assumption that 'before the universe existed' is not sane.
It is purely based on an extrapolated calculation, relying on a man-made definition of time quantity.
i.e. defining time relative to matter/motion
It becomes a circular argument.