I don't know how to service my own car either, but I'm pretty glad the hood isn't welded shut as I do like that I can get it serviced cheaply by a professional (whether a third-party or the original dealer): even if you don't want to take something apart yourself, the fact that simple repairs or upgrades will take hours of risky (as in, possibility of destruction of the device) labor or require replacing large expensive parts unrelated to your goal is not magically irrelevant.