The desperation of pain sufferers aside (for whom the slimmest route to relief must seem infinitely worth it), for the DIYist, there is here the wonderful temptation for the short cut to self-improvement, enhancement without effort. At the flick of a switch you can fulfil your (brain’s) desire: faster learning, deeper understanding, creativity, calmer mind.
And why not? If it’s harmless. Only I would be a little concerned at the long term effects of disrupting the delicate electric flows in my brain.