You know, I'm trying not to be a huge bitch, but your entire post just screams "I'm right about everything and you're wrong because I say so, so here's a wall of text to railroad you."
Actually, I can't really read what you wrote because of all the random capslock in there.. however since you didn't do that in the last paragraph, I can read that, so to that... Okay, I guess because you and a handful of your friends don't respond the way Ran does, (which BTW I did mention my friend does his job fine, but he has to go to lengths to deal with it), it means she's clearly OOC and horrible and just bad. Right? Your personal experience negates anyone else's, correct? That is what you're saying, right? I mean, Aoyama Gosho just created these characters for shits and giggles and didn't really think them through and doesn't keep them in character ever, nor are they based on the way real people in real parts of the world act, and clearly just has them do things that no normal people do for the hell of it, right?
Not everyone is good at multitasking, and not everyone is going to get used to seeing death all the time. I mean Ran doesn't say that to Shinichi in the first case or anything. Oh wait, she does.