Well I agree with you that "if you kill yourself you die" is a sufficient and primary argument against the proposal. I was merely following the implied "what if somebody is in a suicidal mood and therefore not convinced by the primary argument, what arguments are there against the feasibility of the proposal on its own terms" of this subthread.
In secret, an unemployed man with poor job prospects uses his savings to buy a large term life insurance policy, and designates a charity as the beneficiary. Two years after the policy is purchased, it will pay out in the event of suicide. The man waits the required two years, and then kills himself, much to the dismay of his surviving relatives. The charity receives the money and saves the lives of many people who would otherwise have died.
Are the actions of this man admirable or shameful?