If it wasn't meant to be done quickly, they'd make it require time and effort to complete. They wouldn't make it a random thing, because then you get the few people who do just finish it in a single attempt because of dice rolls.

The RNG is a gameplay prolonging tactic of the most blatant and minimal-effort sort. It gives the impression that the development team just couldn't be bothered or didn't have the time to make actual content.