It is possible for an adult to be just as spoiled as a toddler.
Parents know what happens when they let toddlers have their way. It's chaos and crabbiness. We are grown up toddlers if we are only happy when things are going our way. Waiting and praying through some very uncomfortable situations is "wait training" at its best. We wait. We grow. We learn how to patiently endure, and then the next waiting period doesn't seem as hard.
God is building our strength along with good courage while we pray and wait. We may imagine that it would be easier to just put in a prayer request by 10 a.m. and have the answer by 4 p.m., but having our answers on demand would train us to expect life to be easy. Life is not an endless series of easy paths. Extended times of prayer are also extended times spent with God. We want a stronger relationship with God, so we need to learn to accept that sometimes that depth is developed in the dark and needy times.