Originally Posted by
Rolla
Correlation isn't causation.
... and installing the front rotor, pedals, stem, and bar, none of which typically arrive fully assembled. Then they'll take it to the shop when they discover they need to true/tension the wheels, dial in the disc brake calipers, add or subtract spacers, cut the steering tube, adjust the derailleurs, or convert it to tubeless.
Ignoring that most of this will not actually be needed on a ship-to-home bike, I'm still not sure what the concern is, at least from the perspective of the shop. They don't have to do any of this stuff for free on a bike they didn't sell.