My argument regarding this tends to be:
According to the bible, god created 3 "perfect humans" - Adam, Eve, and Jesus. Of those three, 2 of them 'failed' to meet "god's production standards". That's an functional to defective ratio of 1:3, or 66% defective.
Furthermore, we know that many of the "perfect angels" also failed, though the bible does not give an exact ratio, it seems resonable to conclude that the number is again quite large.
Now... if Intel was producing Core chips so that 66% of their chips failed coming off the line, Intel would be a *failure* in the chip manufacturing business, and would no-doubt go bankrupt. Most human creative endevors such as this like to see success ratios over 90%, and perferably in the 95-99% range. If mere humans can acheive 99.9% production yields - You would think that a intelligent god could create perfect creatures that were effective 100% of the time, rather than the majority of them being defective and needing to be destroyed. - Lime