not really, it's because this community is mainly on user to user tech support thingy. what do you see the most on tech support? that's right, problems. you never call the tech guy/girl when all is well dont you?
but to further answer your Q, it's mostly because of simple things( by simple i mean the problem isnt likely to be a total loss of the whole system). and even if there's a defect in one or some hardware(shit happens) it's still covered by warranty.
there's very little problems reported by user-error(incompatible parts, sweat/drool induced short-circuit, boring the mobo cause you slip while handling a screwdriver, ect), sort of.