My uncle actually repairs old pinball machines on the side, and he says the real trick with newer stuff is that manufacturers stopped publishing the schematics, so even if you wanted to fix it, you're basically flying blind. It's not just that parts are sealed or glued together, they actively hide how it works.
Oh man, I love that kind of talk, but it always makes me smile. My grandpa said the same thing about TVs. Thing is, a paperclip might get the door open on an old washer, but it wouldn't fix the main computer board in a new one. The machines really are built different now.