I will prove to you that God exists

[Sheldon]

He has misrepresented the scientific term fine tuning, which is a metaphor, as a literal term validating the supernatural, despite there being no scientific consensus for the latter, and the supernatural being unfalsifiable, and thus unscientific by definition.

Perhaps Drew is frustrated by the untestability of the multiverse, and is saying, "Hey wait!  God is untestable too!"

However, the multiverse is one possible extrapolation from current knowledge, even if it is untestable.  Unfortunately, the God-concept is not.  It fails for many other reasons.

The scientific term fine tuning, no more means the universe was literally fine tuned, than the term Big Bang literally describes a big bang.