Good advice doesn't stop being good just because people stop following it. Ultimately success is a matter of effort.
It's so sad that people still believe this lie.
It creates a victim-blaming mentality of assuming that anybody that failed simply didn't try hard enough.
Sometimes, the success of a business comes down to just being at the right place at the right time. Sometimes, it's just a matter of having rich parents that gave you enough seed money that you could actually dedicate time to your business rather than having to work 40 hours/week just to pay the bills before being able to spend any time on your business.
Even if you were handed opportunities on a silver platter (ie. rich parents), you still had to put in your own effort somewhere along the chain to get the ball rolling.
If you never start, no matter how lucky or good your circumstances are, you will still be at 0%. Therefore, there's no success without effort.