It has nothing to do with keeping the thing. It has everything to do with praying for materialistic things vs non-materialistic things. Praying for someone's good health may not make it happen, but it shows a selflessness whereas praying for pearls shows only a selfishness. To pray for things indicates a lack of concern for the world around you, and a degree of self absorbtion.
Christians can pray for things (but then they are probably CINOs anyway). However, a crises of faith could also occur by praying for someone else and it not happening.
No, that you wish for them is the telling subject. You could have wished for world peace. You did not. You wished for material things. That is telling upon itself.