Lol, well argued. Let me rephrase my earlier post. It's not so much that I have a problem with Dean voicing his concerns to Sam or that I think it's unrealistic he would. I don't even have a problem with the dialogue itself. My gripe is with where, how and why the dialogue takes place. As Dpebbleson already noted before me, it's almost always at the end of of the episode or when they're near/in the Impala and when you use a setting or a time period too often for a certain action or event it, to me at least, makes the action/event feel less organic/real when watching it. Likewise, I'll reiterate that I find the whole "our relationship is strained" thing to be boring. I don't deny that given the circumstances Dean should want some answers, but the fact that he's in a position where he the lack of those answers are straining his and Sam's relationship is simply a little old.
Libra113, you make a good point when noting that it's not always easy for writers to gage how well an audience is going to understand or interpret certain elements of a show and as such sometimes might feel it necesarry to make sure things are clear. It's also true most TV shows do follow a certain formula even if they're good at hiding it. I'm certainly not saying I could do better myself. However, as with any trade whether it be in the sciences or arts, the best way to approach and understand how to do something properly (at at least well in the case of something subjective like the arts) is to simply look at the way others who have gotten it right in the past were able to do so and to me writing for a TV show should be no different. There are lots of series that have been able to make the playing out of their story lines from episode to episode seem more life like even if they followed well masked formulas. Angel, The West Wing, Alias (perhaps one of the most fomulaic shows of the 2000s), Law and Order, Lost, Entourage, Boardwalk Empire, Smallville, True Blood etc- they all (despite some of them being as far away from believable as a soap opera might be) were and still are able, for me at least, to present a certain feeling of reality because the interactions between the characters were/are fluid (both in the settings and time archs of the episode) and the relationships between them were dynamic rather than stoic (I had to chuckle to myself when Gamble was pitching season 6 to everyone saying it was "going to be about the brothers realtionship" because it's not like the past 5 seasons were about that). To an extent SPN does those things, but to an extent it doesn't.
As such, I'd simply make the argument that if they need to impliment the arguments between the brothers somewhere in the show the writers should at least make it random. Place it in the middle of an episode; place it somewhere else other than near the Impala; have Dean vent to Bobby or Cas about Sam; and maybe, just maybe (although this has nothing to do with the arguments between the brothers) have the balls or breasts to ditch the formula story arch and make the episodes a little more tricky for audiences to guess what's coming on a scene to scene basis. I'm not saying Supernatural hasn't done this in the past, just that they should do it more often because when they do they seem to do it fairly well.
Like I said, that's just my opinion. Some poeple like that whole monster of the week thing and the formula plots do suit those well so kudos to everyone who does enjoy watching SPN because of it. I have just have different tastes is all.
I mean can you image:
Sam and Dean slowly walk through the darkened hallway, flashlight in one hand, gun in the other.
Suddenly Dean stops:
Dean: Seriously Sam we HAVE to talk about what's wrong with you.
Sam: I don't wanna talk about it and shouldn't we focus on what we're doing?
Dean: No! I'm not moving another inch or fighting another monster of the week until you tell me what your deal is.
Not exactly the ideal situation just stopping everything for a little heart to heart time.
Now, to their credit they HAVE worked in some of that during other parts of the episodes (research time, stake outs and whatnot) but the major stuff it always at the end. Likely, they decided that while not REAL it does prevent the scene from dragging the whole show to a hault.
Again it's not ideal and I don't dissagree that it would be nice to see it in other locations and other parts of the episode but I'm not sure how that would effect the story flow and that's something that has to be considered when making these choices.
Sometimes it's a matter of the lesser of two evils.