Yes, ultimately the stock market is gambling, and thus the durability of his product is quite low, but this is an arbitrary distinction from the rest of the interviews on the site. I could point out unique distinctions for a dozen other interviews on the site, e.g. the popup t-shirt company whose product was temporary, the company making $0, the company doing entirely consulting revenue, the pure hardware company, the paperback book author, etc.

What I keep pointing out are the undeniably valuable lessons that can still be learned from what Sebastian did, as well as why a typical indie hacker might find them inspiring and educational, and why they wouldn't apply to your gambling analogy.

I'm not sure why you're ignoring these parts of my responses. Maybe it's because you've already launched many non-trivial side projects, so you aren't intimidated by that particular hurdle, thus you don't find it inspiring, and as a result you feel compelled to focus entirely on the efficacy of his product. Which is fine! But you are not everyone.