I suppose it's not hard for them to add a "queue all actions" button, but you're not actually going to need every service at every gate or in every situation. Refueling, for example, might not occur on a series of through flights (dispatchers can calculate weight and add enough fuel for several legs until an aircraft gets to where gas is less expensive). Catering, likewise, might not be available at an airport that is flown into infrequently, and the crew would have enough for the return leg.