You're criticizing the wrong thing. Address the specific instance when they get it wrong, not the general idea of being concerned about edge cases, which in many cases actually are highly problematic.

Once again you are putting words into my mouth. I never said that worrying about edge cases is wrong, nor that discussing them was. The sport of claiming that they aren't handled when they actually are, however, is a pet peeve of mine. I hope you see the irony of claiming that someone having a pet peeve is incompatible with democracy.