It's not terrible advice, but it scales less well than the writer thinks. To really scale, you:
1. Engage with the right challenges (large or small)
2. Invite others into the process, celebrate their successes etc
3. Coach others to start from #1
Perhaps its organisational scope isn't much bigger than the team, but to my mind, the article doesn't go far enough beyond #2.
Do it, and you're the best kind of leader, one that makes other leaders. That's what scales.