I would put forward that we can do many things collectively but not individually because we are part of a collective organism much more than we are individuals, though we are unable to see it due to a human having a limited perspective of only a part of a whole.
It is a common tendency to see humanity as a set of standalone humans[0] (if we cannot do something individually, but we can collectively, then we sort of can’t do it). However, a human only exists in context of others, and all we do is always in many ways (even if not real-time) a collaboration (starting from our education).
I’d argue an individual human being able to understand enough to navigate major problems of their world can’t be expected to exist and was probably never the case.
What is an alarming issue is that sometimes even a figurative anthill of many humans, as a collective super-entity, cannot adequately understand and navigate the reality it is facing.
[0] It is not helped by sci-fi that depicts various aliens as being collective beings, somehow contrasted with humans. In reality, we almost never go completely alone[1] for prolonged periods (except pathological cases), we are smarter when there is multiple of us, and the core of our interpretation of consciousness/sentience requires it to be social (anything else, and I don’t think we would even recognize it as consciousness—maybe that somehow relates to the great filter, too).
[1] When we do, our consciousness still supplies models of others in our lives, one way or another motivating our actions.