I've heard this before, mainly from "hustle culture" folks, but have never witnessed it in real life. I've followed quite a few people, both online and IRL, who have persevered through repeated failure, motivated by "passion" and convinced that success was around the corner.
Almost none of them achieved success. Instead, they ended up burned, jaded and in a few cases even genuinely suicidal.
As someone else mentioned in the thread, the kid is clearly talented. He has released 10 games on five different platforms at age 22 with no assistance whatsoever. That is genuinely exceptional, and he is without doubt in the top 10% of game dev grads.
I'm not arguing that you should quit after one attempt either (even successful designers fail maybe 50% of the time) but it seems irresponsible to suggest 10 failures in a row are a sign of success to come and he just needs to eat shit for the next 5 years.
Far more likely than not, the repeated failures suggest that his talents would be better applied elsewhere.