I see your point but I feel that you're making it a little too simple. For example, my mother had five children, she's always said that she desperately wanted children and it's all she could think about when she was a teenager (I suspect trauma played a huge part in her obsession to have children).

But she was abusive and neglectful throughout my childhood. She clearly could not cope with the emotional needs of 1 child, let alone 5 children. In some ways, she would have "died for us", as you say - but in many other ways, she was an inadequate parent who harmed her children. It's complicated, not simple as you seem to think.

Myself and siblings have all struggled with depression, anger and addictions in adult life. It's taken me many years of therapy to be even half way to healing.

On the other comment thread you were making this point on, the commenter told you her mum left when she was 6 years old. I'm unsure why you're persisting with this simplistic idea that a regretful parent can still be a good parent - yes you're right, but reality is usually more complicated than that.