Thanks for giving these interesting examples.
I hope that this doesn't come across as moving the goalposts, but for me it's a given that popular Youtubers can multiply the success of a game, and that this depends to a large extent on luck. For me, the crux of the matter in discussions about game development profitability and survivorship bias is not how much luck influences the maximum possible success of a game.
For me the relevant question is: If you develop a carefully crafted, fun game based on a game concept you have reason to believe will have a decently sized target audience, will you make enough money for a living with some kind of predictability, or does even this depend on luck?
Now when looking at The Void Rains Upon Her Heart, I'd like to know the sales figures before the jump in popularity. You can filter Steam reviews to the period before the game's popularity surged in June 2023. At that time, there were 561 reviews (or 338 reviews for copies sold via Steam). Using the common sales estimation trick of multiplying the number of reviews with 50, we get approximately 28,000 (or 17,000) owners before June 2023. I think the price fluctuated between $9.99 and $6.99. Assuming that after Steam's 30% cut and taxes there are about $3 left on average for each sold copy, then 3 * 25,000 = $75,000. According to the game's credits on MobyGames it was made by a single person. Depending on how long he took, maybe it is reasonable to assume that the game was en route to profitability anyway?