I feel the players expectations have not been adjusted to the game. This is a game set in 'the dark times' where Jedi lore was all but lost and most force sensitives had difficulty tapping into their power.
Not only that, Force Powers can get ridiculously powerful, the use of having to flip a dark side and tap into the emotions or darker side is to reflect the temptation element of the Dark Side. They may feel that doesn't sit well with them, but clearly if they want to use their power, they have to accept that risk. Now once they get to a higher force rating the chances of them rolling light increases and they perhaps will only rarely need to tap into their emotions and get tempted by the dark side.
If I was GMing this group, I would sit them down and make them reevaluate their expectations of being a force user (not a jedi) in the game. They won't be able to activate Force powers if they don't want to take the conflict and tempting offer, that's why it exists and the trade off for not suffering the effects is not activating your precious power. If players have a problem with that...well...either allow them to work within the confines of the game, roll up new characters, or if they get aggressive, point them to the direction of the nearest exit.