This pattern expresses a rhetorical question meaning 'isn't it perhaps' or 'I wonder if it's not'. It suggests the speaker has a suspicion or inclination toward a certain conclusion, but frames it as a question to soften the assertion. It often appears in essays, speeches, or formal writing, giving a reflective, somewhat philosophical tone. For example, when pondering a societal issue, a writer might use it to propose an idea without stating it bluntly. In conversation, it sounds overly formal and bookish, so you'll rarely hear it in casual chat; it's more at home in written critiques or academic discussions. The まい here is the classical negative conjecture, making the whole phrase mean 'it is not that...?' essentially, so the nuance is that you think something is true but invite agreement or further thought.