The cost of providing customer support is clear and easy to measure, while the benefit is nebulous. This leads to incentive structures centered around controlling costs. That means rewards for handling more calls, and thus punishment for taking too long on a call regardless of the merits. In such an environment, it is inevitable that the reps will care about their call times instead of the customer. "It is difficult to get a man to understand something, when his salary depends upon his not understanding it."

If you empower customer service to actually provide service, they will. Shitty service isn't because of shitty reps, it's shitty incentive structures. They're not trying to cut down on support effort because they want to play solitaire, they're doing it because serving too many customers with difficult problems will literally impoverish them.