When people fall short that doesn't make the word to none effect. That just means 'people' fall short. I agree people in the Bible fell short as we all do, yet it's not because the Word was flawed but because they were human. The different religions came about not because the Bible was flawed but because man had/has issues. As far as you not seeing anyone truly living up to standard that may be true to some degree but you also have to ask yourself if your "view" of the Bible standards is true since you don't seem to fully entrust in the Word of God. It all boils down to the fact that we are accountable individually to God, not excusable because of how some pastor, reverend, etc. may or may not be living. Thus the Bible truth "follow me as I follow Christ" (1Cor 11:1).