Except Hillary was very recently saying that Obamacare is great as it is, until she had to pander during the democratic primary to make sure she won, does not favor breaking up the banks, and was for keystone until she was against it. She doesn't have a lot of credibility on those issues and needs to have her feet held to the fire.
Which is exactly what Bernie is doing right now, and what people need to do for the next two years after Hillary hopefully wins. You can support the Democratic party without worshiping its figures as these mythical paragons of virtue that can do no wrong. I know that's a mindblowing idea for a lot of people on this forum.
Of course Bernie doesn't control the democratic system. Who gives a damn about Bernie; he's just one guy. But his ideas absolutely need to be fought for, no matter how much arm-twisting it takes, and your idea that the Democratic Party and its assorted band of celebrities will just magically take care of us without any outside pressure is woefully ignorant of history.
I've never heard Hillary say Obamacare was great as it is. She wanted a better plan from the beginning. But that's here nor there. And she has been for regulating Wall Street ever since her Senate days. And at least Hillary is open to changing her mind about things, and not in a mentally unbalanced way like Trump, but after she gets enough facts to make a better informed decision. I find that a good thing.
More than you realize, we don't idolize paragons of virtue. It's not a mind-blowing idea you are expressing. You think you are, but it's not.
And no one is telling you not to fight to change the system. But what we are saying is that change doesn't happen over night. You have to fight for what you believe in, but realize that sometimes you LOSE temporarily. But you don't stop fighting, you just readjust your method of attack and try again.