Except the "kid that will give you the most bang for your buck" might be aware he's slightly below the best in the pile when not more artificially stimulated than the competition. Artificial stimulants might deliver a payload rather more disturbing than cumulative intelligence gain when applied systematically over a period in an intelligence arms race: we know a few other ways of stimulating certain aspects of the mind that aren't entirely benign.

As for entertainment, I'd probably not object to watching steroid-pumped athletes if I was confident they wouldn't end up with anger-management and biological gender disorders afterwards. Same applies to stimulating the brain with electrodes, except we don't know where/whether that might go wrong yet. Ben Johnson wasn't competing to run the world; but at the risk of invoking Godwin's law, the track record of those using stimulants to help them run the world isn't great.