Maybe if you live in the rust belt. They are shielded from the weather and are coated in corrosion inhibitors. They should be inspected and adjusted when the brakes are serviced. You’re not wrong in that they can be sensitive to corrosion and dirt, but to say they’re least reliable for an e-brake is not correct. Even the electric e-brakes use cables.
Is there another type of e-brake besides line locks and cables on regular cars? I’ve only messed with a few cars with electronic e-brakes and most everything else I’m experienced with is pre 2005. Have they cheaped out on the cables now?