> it was always odd to me that "booking a [flight|hotel|concert tickets]" is the canonical example

Yeah, the weird part is how the people promoting the idea seem to believe the average (?) consumer will tolerate a particular risk/reward profile: It implies over-spending or cancellation fees or return-restocking fees are beyond reasonable concern, trivial compared to the minutes it saves the user who never does any verification. ("It's one banana, Michael. What could it cost, $10?")