I am pretty sure that when I was a child being beaten and neglected by violent and alcoholic parents, ending up in a dysfunctional and oppressive care system where there were no expectations of me I didn't consider being born white and in the U.K. an advantage at all.
I'm also pretty sure that when I was kicked out of care at the age of 17 with no support, nowhere to go and with just £20 in my pocket that I didn't feel lucky.
I do however feel lucky now because of the choices I made then and because of something in me that was determined to drag myself out of the life I had led until that point.
It's not as simple for the majority of people to be so black and white about their lives. As someone earlier pointed out you can have all the advantages given to you and still not do anything with them or achieve what you want to achieve.
I have friends who were in the same care system as me, they had the same low or non existent expectations as me and now, unlike me, they are living the stereotypical life that others would expect of people with their backgrounds - no job or minimum wage job, lots of children, dysfunctional or abusive partners, a life on benefits with no hope of getting out of that poverty. I have friends who, on the surface had charmed lives, interested parents, good education and opportunities for social mobility who are depressed, anxious and underachieving. Neither of these two groups consider themselves lucky.
I, on the other hand, would actually be quite pissed off if people put all of my achievements down to pure luck, or assumed I had had greater advantage than them. Yes i was lucky in terms of the outcomes, but I did it myself. I made very concious choices and decisions by myself, for myself, in order to achieve the life I wanted when I could have just as easily become another person who lived up to the expectations people had of someone in my position.
It's way too complex to tidy up all neatly into little packages. Too many variables to compare with others. Having a chip on Ones shoulders about people who have more than yourself inevitably creates a them an us situation where people start their sentences with "but it's not fair...because they had xy or z"