[diacritical]

> you can't have pleasure without suffering

That's not true, though. There's no physical law that states that an X amount of suffering is required for an Y amount of pleasure. Nothing prevents you from taking a brain that's feeling pleasure and keeping it in that state. We don't have the technology, but it's not impossible theoretically. It's a configuration of neurons that somehow gives rise to qualia. Maybe in the evolutionary or day-to-day psychological sense we "need" suffering to overcome adversity and get stronger or not to become too content with what we have and lose it, but that's very far from a law of nature or a necessity in the real sense. And obviously some animals live their whole lives in bliss, others in agony. So it's not like there aren't any real life counterexamples.