How come the slightest typo on a flight ticket means you won’t get on the plane/admitted into the country?

Question

Even correct spelled names in the in the wrong fields won’t do, like first name in surname and vice versa. Where does the problem occur? Cause you have like atleast 5 – 10 customs agents and flight staff manually watching your passport/ticket, and they should be able to conclude that the ticket is yours. Or?

In: 49

Answer 1

Crossing a border is usually completely separated from getting on a plane, customs don’t ask for your boarding pass, they just want to see your passport.