If you’re too important to carry boxes, you’re probably not ready to be trusted with the plan.

Refusing the unglamorous part of a job usually signals that you are more attached to status than to the work. People notice it immediately, and it costs you the thing you were protecting, because responsibility gets handed to whoever will do what the situation requires. Willingness to do the small task is what makes the large one credible.

When something needs doing and nobody has volunteered, do it without commentary. Carry the boxes, stack the chairs, make the copies. Then ask for the larger role, and notice that the asking has become easier.