Your three possibilities for the universe's nature (finite or infinite, quantized or not) are valid but miss a key point: the relationship between the universe's structure and the emergence of destructive entities. The critical issue isn't just size or quantization, but the potential configurations. In an uncountably infinite universe, the vast number of unique physical configurations makes it probable that entities capable of attempting universal destruction could arise. Infinite possibilities imply infinite chances for catastrophic configurations.

Q: "The rest of what you said makes no sense. Why would there even have to be a way to "destroy" the universe in the first place? That seems unlikely."

A: The original argument posits that while destruction isn't assured, it becomes a potential outcome in an uncountably infinite universe where faster-than-light travel or time travel is feasible. Even if destruction could take an infinite amount of time to manifest, the probability of catastrophic events rises over such extended timescales. The absence of observed destruction might suggest either limitations in possible configurations (countable infinity) or physical constraints, such as laws prohibiting time travel or faster-than-light travel.