I'd argue that moving from a capped track to an uncapped track requires much more than hard work. It requires at the very least an expensive investment, sometimes expensive credentials. Worst case, you need to be of a certain class to do it, and not even money can buy you the uncapped track.
If you're flipping burgers at McDonalds, you can't just "hard-work" your way to owning that store. Even if you pull 3 shifts and are the best burger flipper in the state, your boss is never going to say "thanks for the hard work! you now you own the store." This track switch is gate-kept by requiring a capital investment.
If you're 3rd junior engineer from the left at your tech company, you can hard-work your way up to senior, maybe even principal engineer, but you will statistically never be able to hard-work your way to CEO, where the rewards are truly uncapped. Nobody hard-works their way to CEO anymore--that track is reserved for a separate non-employee CEO class, gate-kept by credentials, and the good ol' boy network.
If you're working as a start-up employee, you're never going to hard-work you way to founder, where the rewards are uncapped. You think you're going to be the best developer on the team, and then the board is going to say "congratulations! we now deem you a founder with founder equity!" No way. The company already has founders. If you want to be a founder, you need to make a capital outlay and risk your own business.
If you're a nurse, you're never going to hard-work your way to being a doctor. They don't promote nurses to doctors after years of hard work. You need to, again, spend money on education and pass the credential gatekeepers in order to switch to that track. And even when you're a doctor, you're working for the hospital, and are not uncapped. You can't hard-work your way to owning the hospital. You need to spend capital to own your own practice.