There is a profile that appears regularly: the director who was once an exceptional agent. He knows how to prospect and close better than anyone. So when a difficult listing comes up, he handles it himself. His logic is perfect: he is the most competent.
In the short term he is right. In the long term he is building a business that cannot function without him. Every hour doing what he already knows is an hour not invested in developing his team or building systems that allow scaling.
Marshall Goldsmith wrote it precisely: what got you here will not get you there. The skills that built your current success are exactly what may be limiting your future growth. Not because they are bad skills. But because when you are very good at something, it is almost impossible not to do it. The question is clear: what tools do you need to let go of?