The problem with Lot’s wife wasn’t just disobedience. By looking back she revealed the true condition of her heart. She was filled with regret at having to leave Sodom even though she knew God had scheduled it for judgment. Sad to say, many believers feel this way today. They are not excited about the rapture even though they know God has scheduled this world for judgment.
The difference between Lot’s wife and today’s reluctant believers is that Jesus died for this sin as well as all their others. When they get to the Bema Seat judgment they will discover they’ve disqualified themselves from receiving the crown of righteousness which the Lord will award to those who have longed for His appearing (2 Tim. 4:8)