The passage appears to use the rhetorical device of aporia: the narrator asks a question expressing a certain doubt ("But can one really call it a life?") and then proceeds to give two possible answers. However, neither of these answers really resolves the question; instead, they read like an elaboration of the doubt expressed by the question.
If the narrator had given a clear and definite answer to the question, that would have been an example of a different device, i.e. hypophora.
Note also that the narrator presents only two potential answers to his question, as if no other answers existed. He may have fallen victim to the fallacy known as false dilemma or false dichotomy. However, there seems to be no intention on the part of the narrator to mislead the reader or listener, so this is not being used as a rhetorical trick here.