That's psychotic.
I don't rope rescue, but I sure do rock climb. You can rock climb with ropes or without. Ropes = a large safety margin, and the majority of people who climb, utilize them, as part of their safety system. Unless you're pushing your own grade level, the actual safety system isn't actuated - you're just using it "just in case" (like, "just in case you fall from a cliff, 500 feet up - gee it's nice I'm tied to something).
There are also those who climb without ropes. Perhaps you've heard of some of them [0], and most likely, because they actually climb without a rope. High Risk. Your idea of startups, let's say.
But that's just what the public sees. The free soloist has to be absolutely comfortable to go without the safety margin of a rope. Because of that, the majority of their climbing is done, still with a rope. When they go ropeless, the climbs they do are much, much easier. Yes, the risk is there, but also there is the understanding, clearly, what the risk is really about.
The death rate of climbers that are unwilling to ever use a rope, because they find that high risk = high reward would be close to 100%. But those who do survive are not going to be doing too well - they're never going to progress.
So, perhaps startups have this illusion of high risk, but maybe also they're also kidding themselves. They're burning through their lives, and offloading the real risk onto their safety systems - whoever is putting up the money. And they can do that (the investors), as they've diversified their portfolio enough that risk is spread around.
[0] https://www.youtube.com/watch?v=SR1jwwagtaQ