While that's true, top tier players are often not encumbered by needing to understand that "housekeeping" smaller deals are a lot easier to get done, than the big ones. Which, time and again...we've seen players take completely the wrong way, and burn a relationship and contract negotiation. Which is a kinda silly thing to do, by piddling around with peripheral player contracts and potentially to that star player, making it look like you're not making them a priority.
It's not exactly reasonable or logical...but being a top-tier football player doesn't automatically come with a measured approach to contract negotiations, and a set of magic "management understanding" mittens. Understanding football team management, is just so far from a prerequisite of being a good football player, and the agent can often only do so much to assuage things, without getting they own *** fired.