I think the implication here is that these drugs while adding focus also alter other personality traits and can lead to dark places. Stopping amphetamines is regularly painted as a traumatic experience. Here's some examples: - An old roommate of mine talking about the agressive mental state as side effects of her ADHD meds. - Regular use in the military, likely providing some buffer for the remorse and trauma of taking life or losing comrades, or precluding moral objection to bombing the civilian target etc.

Stuff like that, channeled into being the CEO.