Another big reason why Apple fans pay a premium is for the seamless integration experience that doesn't make you think. Since Apple controls 100% of the hardware it can ensure that there are never any problems like x drivers that crash randomly and take your system down.
Linux will always be oriented towards the hobbyist type that, when things break down, opens up the box and tinkers inside. Linux can't control the hardware it's deployed on so it'll always be at a massive disadvantage.