Build quality, that's a riot. Here's a riddle for you: my $300 Thinkpad and $1,500 Macbook Pro each hit the concrete from waist height. Which laptop can I open up and keep using like nothing happened?
Build quality != resistance to drops. You can have a rugged, impervious laptop that will survive a drop from an airplane onto concrete, but if the keyboard flexes and mushes when you use it, that's not exactly 'good build quality'. Manufacturers optimize for different parts of the UX and it's valid for customers to pick which device they like based on how well the product does in whichever area they care about.
