I see that ^ statement a lot in discussion spaces, mostly in Reddit and Facebook groups.  And I wanted to tackle that.

I do think that you have to acknowledge that a work of fiction is a work of fiction. You can't expect storylines to be 100% realistic when they're very much reliant on plot. To quote a song from Crazy-Ex Girlfriend: "If you watched a movie that was like real life, you'd be like, 'what the hell was that movie about?'" The same applies to all works of fiction. 

At the same time, the characters do not know they're fictional. There should still be some rationale behind their actions (unless they're meant to be incredibly impulsive and/or irrational people). Storylines can push the boundaries of reality, but should still follow a somewhat logical course, unless they're meant to be absurdist shows where logic doesn't apply. Characters should still act consistently with who we understand there to be, unless, again, they're meant to be inconsistent, or we're seeing a side of them the show has always hinted at but never tapped into. Of course, fans are bound to disagree on what works for them. One person might think a storyline is too contrived, while another person thinks it makes perfect sense. The issue, then, isn't "it's just a show", but whether or not even within the context of fiction, XYZ worked for that person. 

I also think that "it's just a show" is often said by VERY casual fans who aren't really up for discussing TV, but have still entered those spaces. There are a lot of people who take a very casual approach - they watch something, they like it or don't, that's it. So it is very easy to say "it's just a show" when your investment is minimal. The problem is, they're not bearing in mind that it's a discussion space, meaning people will want to discuss. Another example might be joining a bird watching group, despite not wanting to bird watch. It's fine if you're good just listening to birds chip and smiling when you spot them in the bushes, but a bird watching group is going to take it to the next level. (Which is why I'd never join one.)

IMHO, anyway. What do you guys think?