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Mael I think there is something to that concept, but the cornerstone is flawed - that opposition necessitates suffering, or vice versa. To me, that's just a single facet of suffering. Suffering can be an absence, rather than a force. For example, if a loved one dies, the suffering truly lies in their absence, not the force of death/act of dying(which I would contend isn't a force at all, but rather an absence of life). To use your example, the absence of an opponent could be the source of suffering for someone, too.
Your initial example, however, is very interesting to unpack (the absence of consequence being the end of suffering, and the connection between suffering and value).