Yeah - A game is (generally) a one and done enterprise. Like a start up it's all about getting it out the door, there's little to no expectation of having to maintain it for any real length of time.
HN has some hot takes but that one is particularly impressive.
Fortnite, Roblox, League of Legends, Counter Strike . . . all very short term projects.
This comment assumes game companies throw away all their code and start from scratch on their next title. Which is completely untrue, games are built on decades old code, like most software. There is absolutely a need for maintainable code.