I'd rather transition to a system where if two people try to file for the same thing within a few months or a year of each other, neither one gets it because it's probably pretty obvious.
What if both of them put real effort (money) into research and arrived at similar/same place? Should it be dismissed as well? Or is there something as joint patent?
It still must be an enabling disclosure, though. That is, it has to teach the public how to make and use the invention.