Availability Is Not the Same as Visibility
A clear sky does not show us everything at once. Orion may be below the horizon or lost in daylight; an aurora may be occurring far from where we stand. Whether we see either one depends on time, location, conditions, and sometimes the tools we bring to the looking.
This makes visibility a practical question. Before concluding that something cannot be seen, we can ask what conditions would allow it to appear. Would waiting help? Would moving help? Would a clearer view, a different instrument, or another observer change what is available to us?
The answer is not always yes. Some things remain out of reach, and a change of vantage point is no guarantee that what we hope to find is there. But the question gives inquiry a next move. We can test the conditions of seeing instead of treating our present view as final.
The same discipline helps outside the night sky. Another person's ability may emerge in a different setting; a possibility may become visible after we learn what to ask. Visibility is shaped by our position. Understanding often begins when we take that position seriously enough to examine it.