Not really. Imagine if it takes 20 years to acquire some senior status, and the world was 100% sexist/racist/whatever 20 years ago(so only white men were allowe

Not really. Imagine if it takes 20 years to acquire some senior status, and the world was 100% sexist/racist/whatever 20 years ago(so only white men were allowed) but 0% now, you would have a bunch of white men as senior rank even though the world isn't sexist/racist/whatever any more.