Religion without spirituality is dead. Christianity is about witnessing to love in all its forms, on all occasions. It does not differentiate, it does not discriminate. To be so busy praying to God that I have no time to serve my neighbour is an abomination to God, and gives him no honour or glory whatever. The religious people in the story could have been in a hurry on their way to a religious service, or to some study session of Scripture that they just couldn't possibly stop to help the injured man. It is this kind of contradiction and hypocrisy that Jesus is anxious to root out.