It is impossible to calculate everything in advance with absolute accuracy. There is always the possibility of force majeure. And those problems that are obvious are already known and spelled out in white paper.
Force majeure is usually either ignored or a reserve fund is pawned to compensate for possible consequences, a kind of insurance. By the way, it would be interesting to introduce an insurance mechanism in ISO.
And what can be insured with this mechanism? Future income or the very fact of the project? For me, this idea does not look obvious.