Thought experiment:
Through whatever accident of history underlies these philosophical dilemmas, you are faced with a choice between two, and only two, mutually exclusive options:
* Choose A, and all life and sapience in the solar system (and presumably the universe), save for a sapient paperclipping AI, dies.
* Choose B, and all life and sapience in the solar system, including the paperclipping AI, dies.
Phrased another way: does the existence of any intelligence at all, even a paperclipper, have even the smallest amount of utility above no intelligence at all?
If anyone responds positively, subsequent questions would be which would be preferred, a paperclipper or a single bacteria; a paperclipper or a self-sustaining population of trilobites and their supporting ecology; a paperclipper or a self-sustaining population of australopithecines; and so forth, until the equivalent value is determined.
Solar system, plus the complete past light-cone leading up to the solar system, has a total of 1 intelligence developed; and since if there wasn't that one which was developed, we wouldn't be around to have this discussion in the first place, there are good reasons for not including that one in our count.
I'm not sure that your latter statement is correct, either; do you have any references to evidence regarding the infiniteness, or lack thereof, of the universe?
I know it's usual to equate "intelligent" with "human", just because we're the smartest ones around, but there are some pretty smart nonhuman animals around; presumably the present isn't unique in having them, either.