The leading theory behind the anomaly that is human intelligence is that humans had the greatest diversity in selective pressures over the course of our evolutionary history which allowed only the most intelligent to propagate their genes. Variety in selective pressures can be seen as correlative in other species as well: aquatic mammals, such as whales and dolphins, which evolved from the ocean to the land and back to the ocean are incredibly intelligent compared to the species of fish which didn't have such a diverse environmental history. Octopus have an evolutionary history of being around tidal pools which also explain their higher-than-average intelligence. Crows are self-explanatory.
But my question is about the consequences of this theory, not the theory itself. One consequence is that it implies that some environment history is shared between all species and their respective evolutionary lineages. Such environments are more general since they must encompass all species, all selective pressure events, all animal observations of the world, etc. One example of such an environment is existence itself. Every species encompasses existence and thus there had never been a differentiation between those who understand existence and those who don't to allow for an understanding of existence to develop via evolutionary selection. The only selective pressures humans have faced have been locally environmental ones thus we can deduce that human understanding of existence can be no better than an ant's! There was never a selection process between organisms which understand existence, and organisms that don't.
This sounds pessimistic, since it implies humans are tied to their finite selective history and therefore are finite in intelligence, but it's actually optimistic since all we need do is expand our selective diversity until more and more general environments select for understanding organisms.
To rephrase: since humans are subject to some of the same certain selective pressures as ants are, does this mean humans have no edge over ants in some aspects?