Did you live in the 70s? Or the 80s of course not, I can tell you from history, facts existing that hardworking men where the rich, physical strength was used to make wealth and hence hardwork was a thing, those who have a high straight to tile the soil got more farm than people who where lazy, so I don’t know where you get all that hut hardwork paid off but yeah this days you have to make use of a lot of attributes to get wealth.
I am not saying that hard work will not be rewarded, and I also believe that no one can become rich without working hard. However, simply working hard is not enough to become wealthy, and this is true in every economic era, not just ours.
That is why many generation, like our grandparent and parent, have worked tirelessly from early morning until late at night, yet most have still been unable to become wealthy.
Wealth and success only come when we know how to combine hard work, thinking, strategy, and planning...as I said. And now we call those factors smart work.