I understand completely, at least from my own perspective @CheerBear , and have struggled with the same sorts of feelings about the same sorts of stuff.
To me, the perspecttive you are taking is a wise and somewhat healing one, but the scars remain as reminders of something that was cherished that we are not in control of. I think we all wonder whether we could have done better, those of us with compassion and conscience, but whether we could have or couldn’t have becomes irrelevant in terms of things written into the past.
As you rightfully said, it can make a positive difference to help support things, perhaps differently, in the here and now, and the future that becomes the here and now ...... bearing in mind that as trauma is often the result of complex injuries across time, so circumstances that go wonky or wobbly are usually the same ..... the result of multiple circumstances, relationships, people ...... and there is only so much we can ever, or possibly should, control.
Doesn’t exactly help that the boundaries can be very blurry too.