Some of that advice is true ... work hard, work at something all the time and do your best ... but always for yourself and your well being and for your own self and your family.
I'm Indigenous Canadian and this is what all my family did including me. I worked for myself all my life ... building, construction, renos, fixing stuff, building stuff all the time ... I did some work for companies and businesses but always with the idea that I wouldn't work more than I had to and only to gain a bit more money to move on as soon as possible.
Twenty five years later ... I own three properties, multiple old vehicles that I maintain myself and I own everything I have without debt ... I'm not the wealthiest but I am debt free and have a healthy savings and I still work for myself gaining a bit more every time .