What kind of privileges or advantages does the person who hears God’s voice possess over the others who don’t?
Usually, we never dedicate time to something unless we realise its advantage and strict necessity for us. When we realise what we are losing by not understanding and hearing God’s voice, then we can become zealous and motivated to do our best in order to dedicate time and attention to it.
You must understand that satan is a thief and given a smallest chance he will take away all our privileges and opportunities in God.