Why does every movie and show have to have a gay character now?

"Small minority" is a redundant expression.

Every show and movie doesn't have to have a gay character. Several do, but not all. The majority of characters in most movies and shows are straight, so within the setting of individual shows and movies, gay characters are still depicted as a minority.

You seem to have an obsession with gay people. You posted numerous topics on this subject matter. Is there something we should know about?

I think representation of gay characters is fairly in line, Lesbian characters too
It never seems heavy handed in films or TV to me

You don't see a ton of it (imo) but they are out there and I think it's a good thing that they get a bit of attention because most of us don't even think of them
They ARE citizens too

I don't mind shows having gay characters. The problem is why they must make their sexual orientation openly explicit.

I mean, unless there's a romantic plot, sexual orientation is mostly irrelevant in the story. I guess most of the characters are heterosexual, but I don't it to be explicit neither. Let's imagine every character in the story making constantly explicit their sexual orientation.

- Luke, I am your father.
- No!
- That's not all. I am heterosexual.
- No!
- I had some bisexual experience years ago, with Obi-Chan, but I mostly like women with big breasts.
- I reject the Dark Side, father. And I don't like big breasts neither.
- A pity.
- Besides that, I am heterosexual too and cisgender. I had a fetish with incest, though, my sister turns me on.
- She doesn't have nice bobbies, though I must admit that she looks great when she cosplays as a slave.
- That's the Dark Side talking.

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So are you saying that 5% of movie characters are gay?

If not, it’s not reflecting society at all and you have nothing to take issue with.

I think it's to compensate the years where they feel they were unrepresented. The thing is, there have been gay storylines in media for decades:

Morocco (1930)
Queen Christina (1933)
The Children's Hour (1961)
Walk on the Wild Side (1962)
Midnight Cowboy (1969)
Dog Day Afternoon (1975)
Desperately Seeking Susan (1985)
Paris Is Burning (1990)
The Adventures of Priscilla, Queen of the Desert (1994)
The Birdcage (1996)
In & Out (1997)
American Beauty (1999)
C.R.A.Z.Y. (2005)
Brokeback Mountain (2005)
Capote (2005)
Milk (2008)
I Love You Phillip Morris (2009)
Passion (2012)
Blue is the Warmest Colour (2013)
Carol (2015)
Moonlight (2016)

And these were just from the top of my head.