Staffing your business (or even team) with the right number of people to accomplish a job is a real challenge that the majority of managers don't engage with, instead simply trying to grow their little kingdom to the largest size they can, both for intrinsic power reasons, and also to foster greater jobs for themselves later on.

If I see a manager put "led a team of 40" on their resume, in the interview, I ask "did you need 40 people? Did you need more, did you need less, and how would you have found out?" and the number of times this completely catches them off guard is staggering. It's like... did you choose that number for a reason? Or was that just the most you could fit in your budget?

And sure many hands make light work, but there's an inflection point where the sheer weight of your organization becomes a liability, where getting anything done or changed requires the involvement of so many people that most just don't bother unless it's an emergency. That's how you get corporate rot, and that's how you get all the massive companies we rag on here about all the time who have been making like, 5 products since before most of us were born that everyone fucking hates but everyone uses because everyone else does.