kelly is well known for his teetotal-ling lifestyle and it stems from growing up in the ultra drug infested florida surf scene of the 70s and 80s (well, it's still extremely weed-centric). Also, his father was an alcoholic.
doesn't help that andy irons, his main rival, died from drugs. Kelly is obviously the type that wants/thrives on the absolute best competition possible. Was his 22 million dollar fortune earned mostly against competitors impaired by drugs and/or alcohol?