I think the key here is what we mean by "experiences." If we're talking about something as broad as "feeling happy" or "being hungry," then sure, lots of people share those. But if we're talking about the exact combination of circumstances, emotions, and context that make up a moment, then yeah, it's hard to imagine two people having *exactly* the same experience. Even if two people go through the same event, their internal reactions, memories, and interpretations will differ. So maybe the claim is too broad — it's not that everyone has something no one else does, but that the way they experience things is uniquely theirs.