Now let's look at this, I can think of four attempts at influencing someone with the force from the movies, the classic "These are not the droids you are looking for", Obi waan gives the famous weak willed line, but it's also worth noting what he was doing was pretty easy to rationalise "It's just some old man and his grandson, no need to see their papers. These can't be the droids There are probably 1000 r2 models on this dirt ball alone, they don't pay me enough to drag in every last on."
Jabba, strong willed and also, Luke was trying to get him to release his prisoners, "Show weakness in front of my men and mercy to my enemy? I'd be kiled in a month!"
Watto, Toydarions being strong willed, a businessman probably being more strong willed then most at least in haggling, "No I'm not going to sell my valuable engine part for currency that's useless in this part of space!"
Drug dealer, probably extremely weak willed, "This guy is way too straight laced to buy from me. maybe this whole dealer thing isn't working out, I'll sleep on it."
So both successful attempt were about things that the victim could have much more easily rationalized as their own thoughts anyway. Add in that the other two targets are in jobs were stubbornness and resolve are virtues and even setting aside species it makes sense.
Edited by Vonpenguin, 22 July 2014 - 03:50 AM.