[wastedhours]

Because it works in a similar way to general security - it's reactive to the state of the art of those looking to get around it. Once someone has dedicated time to getting around it, those wanting to get around it have a free pass with that content to use it in the ways they want, whereas those who have no intention to are restricted in their use (which is usually more locked down than it needs to be for genuine users, thus more inconvenient).