I would question whether a person who spends his life frustrated by circumstance and personality has ever examined his or her life.
The answer is there in your comment, the mere fact someone is aware of any sense of frustration regarding their life establishes reflection, or examination, whatever the level of reflection taken If he or she is an idiot then reflection is unlikely, as is frustration, so the idiots win at least in terms of peace of mind. My stupidity is the new normal merely enhances their lives.
The idea that an intelligent person can reflect and then change their life in some way is a lovely idea, but in reality in cannot apply to every intelligent person. Just like the idea of equal opportunity, a great sound-bite but meaningless. Given the same circumstances, the same education, no ten people would all turn out successful, or doing what they always wanted to do. If that were not the case we'd all be entrepreneurs and there would be no-one to work the factories, the taxis, the restaurants etc.
I've done my share of service industry, barman, night porter, waiter, shelf filler, taxi driver, cleaner, and there was nothing wrong with any of those jobs, accept they paid peanuts, so I tried to do better. In reality one of my favourite jobs was van driver for a fruit and veg company, fresh air, exercise and all the fruit you would want, and bugger all in your wage packet.
Intelligence does not guarantee anything, and reflection and examination are not a guarantee of change, and none of that is the argument or point. The point is who is better off? The man who knows there should be more to life, or the man who doesn't?
PS You could at least add "
loving the full stops or something"...just saying