I’ve managed teams that have been excellent without scrum. Then there’s one or two teams that just cannot get things done and are all over the place. Had to introduce scrum to get more structure and accountability to getting things done. Once the team started having a good cadence, slowly weaned off scrum.

Tldr; scrum is another tool in your toolbelt you can reach for. Some teams work better with scrum, some dont. Experiment and see which one works - ultimately the goal is the same which is a productive, well oiled machine, regardless of the ‘how’