>>514099186
plenty of people just want stims because they can make more money on stems
finish assignments faster on stims, learn things quicker on stims
it works for all humans, not just 'ADHD' humans
didnt watch much of the video but assuming he didnt touch on this aspect
it has little to do to with 'feeling special' or 'blaming problems on ADHD' for many of these people

tl;dr
they see other humans with 'flying saucers' (stims), and want that too, rather than use their crappy car or bicycle