Can someone explain to me the need to be represented?

Do people truly feel this way, though?

I can't speak for everyone, but I think for most people that complained about the Oscars, yes.

I have watched many a movie starring Blacks, Indians, Mexicans, Women, though not so much on characters who are homosexual or transexual (As if this would even mean anything plot-wise to most movies), and I just feel it's something people go out of their way to notice and upset themselves over - I don't think to myself, "Oh, well this is a black lead, so I don't relate to this movie's demographic at all", I care more about the story and the message that it's trying to convey. I also don't really understand how the fashion/beauty industries (which is all shopped and faked to high hell anyway) relates...

But people still watch the movies for the message, plot, whatever. They are not saying the movies are bad or criticizing white people, they are just complaining about the lack of diversity. The world doesn't revolve around white people, you know? However it feels like it. I mean, you have the biggest movie ceremony in the world and yet it's a white party. People are questioning why the lead is always white. Why people getting awards are always white? Look at the Emmys, it exists since 1949 and yet the FIRST black woman won best actress just last year, it took only 66 years... Does this feel right?

I used the beauty standards as just an example of how media can manipulate the masses and how it gives privileges to certain people and ignore the others. Which my point is about.

That said, if the main character not relating to you or being identical to you matters so much, don't... watch the movie? Watch something else? I really don't understand the problem. (Not pointed at you directly, just a general question for everybody.)

Why ignore the problem though? Especially since it leads to other problems like I said before.
Also most of the biggest blockbusters are starred by a white lead, so it's not like they have much options. The point of representation is to include, not exclude. Don't twist things.