It's just odd how some people post "bet she's miserable really".
I think that's because the OP has sort of positioned the woman in question as somebody who has fallen on her feet, therefore 'lucky'. Others are pointing out that things like a relationship breakdown mean things are not perfect - and that's ok, perfect doesn't exist for anyone.
You can have an overall happiness or contentment with your life, and recognise that you've had some crap bits too. That's life. A mixture of lucky breaks and hard knocks.
But I do think luck factors in even in very subtle ways. If you had at least one parent who loved you and supported you and tried to be a good parent - that is down to pure luck.
Solid parenting sets the tone for so much of friendships and relationships and no kid chooses to be born to abusive or inadequate parents. Having family who love you and meet your needs, and friends who enjoy your company, helps you find a sense of identity and self worth, which makes you far more likely to be successful in other ways and meet your potential.