The math is correct. Instead, it’s wrong about the linkage between the math and the reality.
The math isn’t ‘correct’, it’s about something else:
You are a company making a decision in a hypothetical situation which is rather unlikely.
2.
You may well be able to see more problems along these lines. I haven’t bothered to put much effort into exhaustively listing them—but I don’t need to, because one problem like this is sufficient to sink the whole argument.
The argument in 1. is what makes the approach overall seem untenable.
1.
The math isn’t ‘correct’, it’s about something else:
You are a company making a decision in a hypothetical situation which is rather unlikely.
2.
The argument in 1. is what makes the approach overall seem untenable.