Worse than that, actually. One of the favorite refutations of theistic arguments is "How are *you* so specially favored to know what God is like. It's only your opinion, not falsifiable, etc. etc."
But they have no compunction, when considering life and/or "God", in jumping to the conclusion (but treating it as 'axiomatic') that God worked and thought primarily as an engineer. Why not a hacker, or even an artsy-fartsy "creative" type?
Cheers!
Because that image of God does not fit in with the 'Platonic ideal' of a God that has been put forward by Christians.