It's like everyone figured out how hashes work just a couple of days ago. What happened to spark all of this conversation? I also keep hearing that this problem

It's like everyone figured out how hashes work just a couple of days ago. What happened to spark all of this conversation? I also keep hearing that this problem is solved with randomized hashing functions, but my best guess is that this doesn't eliminate collisions. It just then becomes roughly impossible to generate a set of keys that would cause enough collisions to actually be a problem. Hooray for data structures.