Tired, discredited, leftist tropes. The politics of envy taken up a notch.
Of course people will benefit from circumstance. I suggested that in my original post, especially when referring to tech billionaires who would have benefitted from being in the right place at the right time with the right idea. To suggest, however, that their success was somehow achieved in the absence of hard work, perseverance and personal sacrifice is nonsense.
You live in a world I don't recognise. One where companies are all headed up by Oxbridge educated Tarquins who were gifted everything. I have a business, I employ people, and I work 60 hours a week and give myself 5 days holiday a year. It's a struggle, and it may fail before the end of the year, but if it does I won't blame anyone but myself, and I certainly won't moan about the fact I went to Caludon Castle and that my old man was skint. If it happens, you dust yourself down and go again.
Social mobility is not at the lowest level for years. Just because a sociology professor wrote a book saying it is doesn't make it true. For every study that suggests this, there is another that contradicts it, and all of them are influenced by the ideological bias of the author. In 2007 54% of FTSE100 bosses were privately educated. By 2015 it had fallen to 34%. You can argue that we are regressing but it isn't backed up by the facts.
Of course there is privilege. Of course some people benefit from a leg-up. We'd all like a society that is fair and provides opportunity for all, but we cannot engineer such a society by being slaves to ideological dogma. How many more failed socialist states do there have to be people stop saying 'ah, well, that wasn't true socialism'. It never is, is it. The penny will drop one day. The unequal sharing of virtues versus the equal sharing of miseries. Take your pick.
The world is not perfect and is not fair. It can be less imperfect and less unfair, but anyone who believes the answer lies in a system of collectivism and central planning should be given a wide berth.