What I'm getting from your post, first and foremost, is that regrets do exist. So, you can't live a regret-free life. What you can do is re-frame those regrets. Look at them from a different perspective. Shape and mold said regrets after the fact. It's a fun bit of time travel, but I think you're absolutely right. Take regrets and see them through new eyes. And, henceforth, take actions that lead to fewer regrets.