Main Question or Discussion Point
From everything I have read so far, we only know of Dark matter by means of gravitational inconsistencies. My question is this: Why is it so outside of the box to suggest that our understanding of gravitation itself may be faulty? Why are we inventing mysterious particles that are distributed across the cosmos but don't interact with anything? It sounds extremely fishy every time I hear it, and I am surprised that there isn't more discussion surrounding the issue.