They are not innately bad, but they are implemented in a bad way. A system of hydraulic control lines cannot be locked behind copyright. They can be physically fixed. A cracked manifold can be welded or replaced. But when fixing a modern electronic system you must have the permission of the manufacturer before replacing a part, or even opening some boxes. Any mechanic can see leaking hydraulic fluid. But modern electronic systems can require special/expensive tools just to read the error code telling you which part has failed.