Why I can't say them interchangeably in sentence 2?
1. ... and Jack was standing there, stunned and stupid, trying to understand how a thing like this could have happened.
(Context: Jack lost his temper when he saw his son ruined part of his manuscript and in anger he broke his son's arm. But after that, he regretted doing so)
2. How could I have made a son like that?
(Context: The speaker is annoyed with his son)
Hi, I don't understand why we can say "could have happened" and "could happen" interchangeably in sentence 1 but we can't say "could I have made" and "could I make" interchangeably in sentence 2?