In fact, I'm not sure it's on anyone. There's inherent risk in every project, and the team's job is to maximize the probability of success. At least that's the way a process-first person would probably think about it.
Results-first folks might argue that a great team will find a way to succeed. And then definitely, having more skin in the game will help with motivation. But I still think even the best team is just maximizing probability of success, and still they're more likely than not going to fail, because getting PMF is hard.