See, if you had just said you found it boring, I would have respected that. But then you went and ran into trouble.
First of all, this is not about 'realism' at all. The people who are claiming it is are kidding themselves. Let's talk about 'realism.'
You're with you're two companions and you meet someone might be innocent, might be a criminal. He claims to be innocent, begs for his life, blah blah blah. You can execute him or spare him. Your noble companions tell you firmly you not to do it, insisting you can't take a person's life because he might be guilty. You decide to take the supposedly 'safe' option and execute him. That way you know he doesn't hurt anyone later on.
As soon as you do, your two companions immediately shout at you in enraged anger, draw their weapons, and step several feet back. They order you to drop yours. Drop your weapons they say, and they'll escort you to the authorities to be detained and interrogated and eventually tried.
You have an option to go for your own gun of course, but if you do you're immediately shot and killed. This is 'realism' after all, not a silly power fantasy where you can draw faster than two trained killers sighted down on you can twitch their trigger finger.
And so you put down your weapons, go with them, and the rest of the game is 'Sit-in-Jail-Simulator-5000.'
Now then, you'd think if this was really about 'realism,' this thread would be full of people advocating scenarios just that. But they aren't, are they? Funnily enough, every 'realistic' choice has pretty much everyone else being docile and obiedient to whatever acts of murder, genocide, torture, and so and on and so forth you commit. We can't have 'realism' getting in the way of our fantasy, can we now?
Is that what 'realism' looks like to you?
But secondly, even if all that wasn't true, it's entirely irrelevant because it's not what the issue is even about. Pretty much every action video game ever made has the protagonist cutting through hundreds of mooks. That's obviously abhorrantly 'unrealistic.' Hell, it's pretty much any fiction that involves any sort of combat, period. The protagonist surving against overwhelmingly odds is an absolute staple. Clearly, 'realism', if we consider 'realism' to be 'that which is most likely to occur were this situation to manifest in real life,' is not what fiction is concerned with.