LMAO this was an epic thing to come back to
Okay disclaimer: Â My primary experience with the EU is video games and the Zahn books, so I fully expect there to be stuff out there to contradict or disprove my theories but w/e what can you do itâs Star Wars
I thought I had written this up before but apparently it was just other ramblings about Force Premonitions, but it kind of ties into thisÂ
I canât explain anything without going into super boring essay mode SORRY:
Firstly, this is built on the Light vs. Dark side not being good vs. evil, and especially not the average New/Old Republic citizenâs perception of good vs. evil.  For instance, the latter might believe in righteous anger, or in the priority of free will at all costs, which contradict Jedi philosphy.  (Also for ease of writing Iâm going to use Sith/Dark-side and Jedi/Light-side user interchangably even though itâs not always the case)
The preservation of life is core to many Jedi philosophies and Light-side abilities, and while in practice this often comes at the cost of things like free will, the desire to harm as little as possible seems to be needed for mind-influencing abilities. Â Dark-sided Force users seem to be completely unable to use mind tricks, draw information out of resistant users, etc. (unless you count Darth Vader reading Lukeâs thoughts about his sister, but....Iâm not a thousand percent sure he was drawing on the Dark side to do that). Â
For example, Darth Baras in SWTOR is an immensely powerful Sith, but has to go to extreme lengths to dig up some ancient artifact to extract information from a prisoner (which ruined his mind in the process)--why go through all that if he could just dive in and take that information himself, or mind trick the [non-Force-using] prisoner into telling him what he wanted to know?  (Plus the fact the Sith need interrogations to the extent they do, and have to resort to chemicals for any mind-influencing results)  My theory is that he could invade his prisonerâs mind, but would make such a wreck of it in the process that it may destroy the very knowledge heâs seeking in the process.  The Sith donât refrain from violating the free will of their victims in this way on principle (like that text post suggested re: fallen Anakin lolol), so it has to be because they canât.
Thatâs where my ideas about the Light side and empathy (described more at length in that link above) come in.  A mind trick seems to be a precision technique, slipping in and tugging at a few strings to tilt their thoughts or memories just enough to accomplish the goal: to distract, to quell suspicion, to make them not want to fact-check that last statement you made, etc.  In most cases Iâve seen it, itâs nothing too enormously out-of-character for the victim, and is most effective when itâs something they could, imaginably, do.  For a Force-user to pull this off, they seem to need some sense of empathy and/or the desire not to kill or ruin the mind of the subject.  The Jediâs control of their own emotions probably helps the process, too, with not...idk, spilling them all into the mind theyâre touching and causing more of a mess.  A Republic citizen might find it abhorrent and violating, but a Jedi (according to Jedi theory...not the way theyâre actually written -_-) would find just killing the person abhorrant.
There are a few wild cards I just donât have enough information on to contextualize, like Câbaothâs long-term mind control of Imperials or the Councilâs treatment of pre-KOTOR Revan, but it seems pretty consistent overall.
I have no idea if this makes sense and Iâm too lazy to edit oops >_>