why can't kino take someone elses canoe in chapter 5

"He leaped up the beach, through the brush line toward his brush house, and it did not occur to him to take one of the canoes of his neighbors. Never once did the thought enter his head, any more than he could have conceived breaking a boat."

"The killing of a man was not so evil as the killing of a boat. For a boat does not have sons, and a boat cannot protect itself, and a wounded boat does not heal."