@Emphaticmaybe
Working hard is a great trait, but if you are forever stuck in a WC frame of mind (i.e. this is my place, etc.) you'll just build up a brick wall in front of you. What I am getting at is that sort of attitude that was shown in that programme "Grammar Schools - A Secret History" , and escaped their past.
Most in the programme were from WC backgrounds, but many have well and truly left that behind, achieving great things in life. Some of them got into a grammar, and for many, this caused a massive rift within their families. Some parents were ridiculous - thinking their children were stepping above their ranks (oh, that' such a bad thing!), even hated the fact that they started speaking differently (more RP, I guess). The parents' attitude - that's what I would associate with a WC state of mind. And those parents still commonly exist in the here and now.
Those people benefitted from the existence of grammar schools, so they went on to do great things. Most people don't have access to such schools any longer, and although many may go on to uni, unlike those who benefitted from those schools a generation ago, they don't seem to be able to shake off the shackles of their past. They often tend to build an imaginary brick wall before them, not considering jobs they could possibly get, if they really wanted to. And it's like a communal psyche.
And apparently, no one ever excapes their "class".
I didn't grow up here, but I think such a state of mind will stop you from ever achieving your best.