Of course not. There was more to it than that. But the decision not to use the theme was symbolic of how Snyder just doesn't get it. If not that theme, then a theme that is equally uplifting. The problem was that the script itself didn't really lend itself toward the theme, because it was such a downer.
This version of Superman is not a symbol of truth, justice and the American way. He does not represent hope, or inspire anyone. Even when he saves a life, he looks like it's a burden, not his calling. Snyder got pretty much nothing right.
Yes lets keep Superman the same, they tried that with Returns and it was a box office dud. I personally enjoyed the gritty tone and I have 0% interest in watching a cheesy Superman movie in 2013 when MoS came out or in the future. Superman saves the entire world and embraces who he is and what his destiny is, how is that not uplifting?