The verses are clearly a parable - unless you really think that Moses and Khidr scuppered a ship, mended a wall, murdered a child etc all in one journey. But then again, you DO believe in talking donkeys.. so I guess you are just desperate to foister your beliefs on others.
The parable is a parable. Simple.
Don't you believe this story by Jesus to be a parable:
Jesus answered, "A certain man was going down from Jerusalem to Jericho, and he fell among robbers, who both stripped him and beat him, and departed, leaving him half dead. By chance a certain priest was going down that way. When he saw him, he passed by on the other side. In the same way a Levite also, when he came to the place, and saw him, passed by on the other side. But a certain Samaritan, as he traveled, came where he was. When he saw him, he was moved with compassion, came to him, and bound up his wounds, pouring on oil and wine. He set him on his own animal, and brought him to an inn, and took care of him. On the next day, when he departed, he took out two denarii, and gave them to the host, and said to him, 'Take care of him. Whatever you spend beyond that, I will repay you when I return.' Now which of these three do you think seemed to be a neighbour to him who fell among the robbers?"
He said, "He who showed mercy on him."
Then Jesus said to him, "Go and do likewise."
Isn't the above clearly a parable (and a famous one to boot?).
How stupid would I be if I insisted it wasn't a parable but was literal? Probably as someone insisting that the parable of Moses and Khidr is literally true - or believing in talking donkeys!