And people can hate but Ashton was actually good, the movie he was in and that terrible script was the problem
Ashton is a HORRIBLE actor in all he does. No script can help him.
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The problem is, most people don't know or remember (or, the ones, who did know him are mostly dead etc. or don't watch movies), how the real Oskar Schindler looked and they accept anyone, who just have the talent to play the part.
With S. Jobs, it's a bit more complicated, since you have tons of pictures and videos of him in media like magazines, TV (documentaries etc.) and of course every corner of the internet(TM). And we (most of us) did see him alive.
That's the biggest problem. So for the actor, it has to look and physicaly act somehow similar, so that the actual people can more easily accept him/his play.
I don't (and neither anyone of you) know, how Fessbender will work or will play his part, since I didn't see the movie, but the first looks of these posters/images aren't really convincing. At least for me. Hope I am wrong and Fassbender will be a pleasant surprise.
Zuckerberg is still alive and most people that went to see the movie knew how he looked like, the actor looked nothing like him. So, how does that follow? The Social Network was a big success artistically and financially.