My Master plays the long game.
Thousands of years ago, He was able to foresee what Humanity would become, what they could achieve, and how He could conquer them easily.
All My Master needs is a fraction of your flesh, and you become His willing slave. He does not want the young and stupid, but the wiser, in order to better control Humanity’s future.
With just one little spell, one tiny change to Humanity as it began long ago, and with servants gathering as we speak, He shall win.
After all, what else do you think your appendix is for?