You people seem to forget that laptop motherboards pretty much house everything, plus you need lots of money for the labor alone. Ever tried replacing a laptop motherboard before? I've done it a couple of times and still get goosebumps on the thought alone. (Hello 20+ small screws)
This issue is not manufacturer specific, every laptop suffers from this same issue.
Especially the ones with nVidia 6xxx and 7xxx series GPU were known for their constant failure rate due to a manufacturing issue.
I once replaced a failed laptop GPU that was a high end 7900 series, cost like 700e for the replacement part plus installing it took around 1-2hrs. Yes, 700euros.
Laptops are never easily serviceable, you don't have a "one board fits all cases" situation that you get with desktops, everything is manufactured to fit the specific model.
Premium price? I'd say that a lot of the 1000euro range laptops actually have pretty decent pricing considering the features and battery life. Sure it costs slightly extra but the cheaper you go, the cheaper it gets. Sure you can get a plastic fantastic acer for 600-700e with the same features.
Go for enterprise stuff in regular PC side and you'll find your expensive stuff pretty quickly.
I do agree that stuff like Mac pro/high spec iMac/MBP is really expensive but obviously it's not meant for average gamers and apple does not really cater them.
Sometimes I think that the apple hate in here seems to be way too biased :/
And this is coming from a PC user since -94 who can't stand using osx.