In my opinion, most of the banks are playing good role for running an economy. I can't imagine our daily life without banking system.
Not only that Banks helps out to secure our money interms of time locking it since if we don't have any bank to placed our money at i believe we will spend it since theirs so many temptation that can make us spend our money in lousy things. Although banks gives us little profits still it is totally ok for me aslong as my money will be safety then theirs no big deal for me for anything low returns that they can give.