The Necessity Objection to the Fine-Tuning Argument

The Fine-Tuning Argument relies on this premise:  

The highly precise and seemingly arbitrary values that enable the existence of life are either the result of (a) necessity, (b) chance or (c) design.  This post is meant to cross off option (a).  

Obj:  The highly precise and arbitrary values that enable the existence of life are necessary and could not have been otherwise.  

But this seems false.

(1) Modal intuitions. Nothing seems necessary about these highly precise values.  It seems like they could be otherwise.  They appear brute if not designed.

(2) These values are not deducible from grand physical theories.  Our best grand theories are compatible with any number of these sorts of values, so they don’t seem to get their necessity from more fundamental facts.  Stephen Hawking for this one.