When Jesus asked this question two thousand years ago, He was alerting His followers about the prevailing spiritual condition of people on earth at the time of His return. Jesus knew the answer: the close of the age would be marked by a mass defection from the truth.
Trust and obey
“For rebellion is as the sin of witchcraft, and stubbornness is as iniquity and idolatry.” Saul saved the valuable spoil and destroyed only what was judged worthless by their “good sense”. God has judged it worthless, Saul did not think so.