This is conventional wisdom. https://hbr.org/2004/01/managers-and-leaders-are-they-differ... https://hbr.org/2016/06/do-managers-and-leaders-really-do-di... https://hbr.org/2022/09/the-best-managers-are-leaders-and-vi... Almost every HBR "Must Read" series on enterprise management says the same thing as this blog post. The business world has been talking about this stuff since the 90s.
It is perhaps possible to interpret these articles as saying anything whatsoever, but they don't seem to specifically say what Paul's article says.