[Etheryte]

If managers oversee 0-2 people in a company, that means it's roughly just one person managing one person managing one etc.

[LudwigNagasena]

Imagine you have a cohesive system that has 10 services, each service requires 1-3 people. The head of the system can assign 10 tech leads responsible for the overall quality of the services or they may have over 20 direct reports, most of whom have nothing of interest to report to the higher-up.