The King was informed in advance by trusted aides but instead of acting and verfying it he did nothing. And what concrete evidence, there was the mice experiment and they can just reproduce it if he was still skeptical. And now he lost his heir to addiction along with the heir of several important families while causing trouble for other the fiance's families as well. Henry got lucky because of Pia's attempted intervention which clearly showed the worse would have been avoided if they acted fast enough.
The King was informed in advance by trusted aides but instead of acting and verfying it he did nothing. And what concrete evidence, there was the mice experiment and they can just reproduce it if he was still skeptical. And now he lost his heir to addiction along with the heir of several important families while causing trouble for other the fiance's families as well. Henry got lucky because of Pia's attempted intervention which clearly showed the worse would have been avoided if they acted fast enough.