No, I think regret is just the other side of paranoia. It's a lack of ability (not necessarily capacity, most likely due to emotional distress) to think through

No, I think regret is just the other side of paranoia. It's a lack of ability (not necessarily capacity, most likely due to emotional distress) to think through the full consequences of a situation and the opportunities it presents. When you're paranoid, you're worried about a bad situation without thinking through the ways you could respond to it or fix it if it does happen. If you have planned through what you will do if the worst happens, there's no way to be paranoid about it. Similarly, it's hard to regret something if you've learned from it and recognize that you never would have learned that lesson if it hadn't happened the way it did. Growth is motivated by responding to problems, not responding to everything going well.