Now that's a classic! I mean the way you argue, not the quote. Very nice, very classic moral relativism and postmodernism. People should never trust themselves and their understanding of the world.
By realizing that you do that invisible hard work (that leads to other people's promotions and enriches others) for your own spiritual sake or for a higher cause or for the order of the universe or whatever other reason, you can live in a balanced way, because you're consciously going in with this trade-off. You live up to some principles that you won't play games, you will play straight up, with high quality work without boasting and playing it up or telling anyone about it, but you also don't desire the riches and the status, that's okay.
My issue is with people who do wishful thinking. They set some principles first and declare that this is how the world operates. When it doesn't operate that way, they don't update their model of the world, but shut their eyes and deny the dark side of getting ahead, but then still complain that the world doesn't conform to their ideal.
This is far from postmodernism. I say look at the objective cold facts: who gets ahead and how, understand the rules, then consciously play it or don't play it, but know each trade-off involved and don't be surprised when your choice leads to the predicted result. And that predicted result could be perfectly fine! You don't have to get promoted out of technical work. Many people explicitly hate managing people and budgets and playing politics and love working with concrete technical things, and will happily trade those promotions and high-class life for an honest, principled, simple life working on interesting problems for decades without climbing a career ladder or keeping up with the Joneses. Nothing wrong with that! But then know that this is the deal you're subscribing to.