Alliances formed over self-interest crumble once the mutual benefits are gone.
President Wang and those eight parents no longer share a common interest, so their hastily formed alliance has already dissolved. With his own child now having an opportunity and the others not, how could President Wang possibly keep mixing with them? If he continued to do so, he might lose his own precious opportunity.
To maintain this hard-won opportunity, President Wang had to change tactics. Now, he started convincing those parents: "The doctor is right; we should prioritize our children's lives. What was the purpose of participating in this experiment if not to provide our children a chance for a cure? Now that their pre-experiment tests are not qualified, not only will it not cure them, but it could also pose a life-threatening risk. Under such circumstances, why should we still insist on participating in the experiment?"