"I never worked on my weaknesses, only my strengths."
This statement is missleading. You certainly can't find any flaws in Steve's technique. And ... I've read in another interview that Steve said that growing up if there was something he couldn't do i.e. a lick, riff, technique, song, etc. that he wouldn't stop practicing until he mastered it. Literally not eating or sleeping until he could do whatever he set his mind to it. Maybe closer to the truth that his compositions accentuate his strengths not his weaknesses.