Why aren't plants black? 🌿

A decent, non-obvious question.  If it's survival of the fittest, then black plants could, not necessarily would absorb the most wavelengths, and out compete those that absorb less.  But it's not about Darwinian selection for an individual, but for an ecosystem as a whole.   The "system" must prosper, even if the individual species do not.  If cooperation works better than competition, than the ecosystem is more robust than one without cooperation.  Would a black leaved photosynthesis "overheat" on a planet with abundant light, but be just right for a dim light environment?  Think dim red stars, overcast skys, etc.. Maybe.