Lambiel always beats Weir and Lysacek by doing quads so Scott Smith can do the same thing if he lands his quads. Oda also does not have a quad. Takahashi occasionaly tries one but not always. So he can beat all 4 of them if he does his quads, the same way Lambiel does by landing his quads, and Joubert does when he does not fall on half of his jumps.
Smith has just one quad---the 4S. He did a quad combo in the SP and a solo quad in the FS at US Nationals, and he still didn't come anywhere near beating Lysacek, Savoie and Weir. The reason? Smith lands the jumps, but not always cleanly; his non-jump elements are nothing special; and his expressionless skating gets badly dinged in the PCS scores. Smith finished 10 points behind the top 3 on the PCS in the FS, and he got mostly 0s on the GOE for non-jump elements.
Smith doesn't have Lambiel's spins or Joubert's joie de vivre, so you can't say Smith will win if he 'just land his jumps'. Lambiel and Joubert, if nothing else, have personality on the ice, while Smith is a skating nebbish. Smith could be most accurately compared to Chengjiang Li, who lands his jumps but has never had a podium placement.
At 24, Smith has already developed whatever personality he is going to have. We won't see any major improvement on that score.