The poster sees it like Hans Zimmer (https://www.imdb.com/list/ls066405124/ https://www.imdb.com/list/ls066405124/) being asked to play scales on a piano as an

The poster sees it like Hans Zimmer (https://www.imdb.com/list/ls066405124/ https://www.imdb.com/list/ls066405124/) being asked to play scales on a piano as an audition for writing a movie score, and then being rejected for some mistake. Indeed, that would be humiliating. In reality, it is more like a football penalty shootout after a match has ended in a draw. There are too many (over?) qualified candidates, and coding interviews are more fair than choosing randomly.