The whole post is really about understanding what the boss wants, but #3 is something more specific so I want to iterate more on it:
A lot of people want to help their boss and have a reciprocal relationship. But the mere desire is not enough - you have to have the "street smarts" to be trusted. If you don't know what sort of things will get your boss into trouble with their boss then even if you have a good relationship its unlikely you'll get significant leeway. You are likely to cause problems out of ignorance and a tight leash is to protect you from that.
A lot of people want to help their boss and have a reciprocal relationship. But the mere desire is not enough - you have to have the "street smarts" to be trusted. If you don't know what sort of things will get your boss into trouble with their boss then even if you have a good relationship its unlikely you'll get significant leeway. You are likely to cause problems out of ignorance and a tight leash is to protect you from that.