That's a lot of the argument around lab grown meat which has technology discovered through nonvegan means, but that really depends on how far you want to take veganism. Would you reject most medical procedures because they were developed through nonvegan means? I wouldn't, nor do I think people should, but if we created a species that only wants to die, that seems very unethical and like we're taking away their free will. Can they really consent if they only ever want to die? I don't think so, and I wouldn't wish that existence on anyone.