Suspension of disbelief

First of all there is no way that the viewer can properly achieve suspension of disbelief. So we are presented with a dystopian society that (judging from the sets) is set somewhere in the past even. And even if we try to believe that such a society can actually exist, it's not possible, since there are certain levels of morality that are being, how should I put this, skipped?

In a morally bankrupt society such as depicted, but not adequately elaborated on, here, why would they permit quasi-normal lives for the children? And if we go so far as to hold them practically captive and then take organs from them and if their lives (as persons) are worthless, why not just slaughter them and eliminate this whole nonsense. How is it more morally plausible to have them live empty lives than it is to grow them like livestock and then harvest multiple organs (heart, 2 lungs, 2 kidneys, liver, bone, skin, retinas).

Taking into account just these notions I just couldn't immerse myself into the movie. And I read posts of people saying that "it's just like Star Wars" and I'm just thinking it most certainly is not. I mean the level of abstraction in Star Wars is made clear with the first line of the movie. Here we are just given the fact that we have "done this" with the advances of medicine and here's the scoop.

Anyone else feeling the same way about this movie?