Some people do not mind working with people, who need some guidance and managing. They get satisfaction from helping them, developing them, advancing their skills and career.
Some people want to work with people, who are self-sufficient – you give them a goal and they deliver. They get satisfaction from getting things done and focusing on larger picture and strategy, not caring about details.
The first kind is what leaders are supposed to do.
The second kind is what managers are supposed to do.
Issues come, when managers are in positions of leaders or if managers have direct reports, who are not self-sufficient.
In small and midsize companies, you rarely have capacity to have so many self-sufficient people, unless you make it your priority when hiring. That is why you need leaders and managers in one at most small and midsize companies. Having managers only or leaders only will not work well in that context.
If you are the owner or founder, you need to pick from the start how to build up.
Having self-sufficient people is great, but more expensive, and you can miss talent and ideas from some more junior people.
Having people who need more guidance is less expensive, but you need leaders and managers in one, which is rare. But you get higher diversity of ideas in the end.