A coverage gap and a hiring need are not the same thing. Some gaps close with internal moves that cost nothing, some close only with a role, and some are a signal that the current team is already carrying too much.
This pillar covers the honest order: diagnose the gap, exhaust the internal fixes, check the strain on the people already there, and only then write a role. It also covers what makes an analyst stay, which is usually the part a clinic can influence fastest.