Because the Quran is a divine text, and cannot be judged by rules of science and experimentation and logic?
Because religious law has always been a matter of interpretation, starting from the Hadith, which, by definition is Muhammad's (PBUH) interpretation of the Quran?
Because the Quran itself gives the right of
Ijmah to its followers as a means for updating interpretations by mutual consensus?
Because there is a wide space between rebuttal and acceptance, and even the Quran and Hadith accept that space?
Need I go on? (You really need to practice more to improve your "intellectual" kung fu!
)