What’s The difference?

So, it seems like the way Brook speaks about building a business team and holding employees accountable conflicts with the idea of ‘manuals’ in relationships – so, like it’s not wise or reasonable to expect our husband or wife to behave a certain way (even though we do enter into a contract when we get married), but it’s perfectly reasonable to place specific demands/expectations on our employees when we’re building a team. What’s the difference? Aren’t we dealing with human adults in both cases