People are ridiculous. That there are people who just can't accept a literal, tangible and provable fact because they value their own opinion and perceptions too much is laughable and really quite sad. The story of the human race on the whole so far, as it were.

Anyways, for people who feel and believe that what happened to our perception of Pluto and the changes therein are wrong or unjust, let's set the record straight. Nobody changed Pluto into a dwarf planet, it always was a dwarf planet. It's just that someone finally had enough intelligence to realize it and say something about it. Is it similar to a planet? You betchya. Is it not similar to a planet as well? Yep. So it's kind of both, isn't it? or neither, depending on how you want to view it. Either way, that's why it's called a dwarf planet. You can argue both sides, ergo, it's not either, or it's both. It's certainly not one or the other, though. So there you have it. A super simplified and easy to understand explanation with no bias attempting to argue pointless technicalities which can go both ways until the day is done.

So why are people so up in arms about the reclassification of Pluto due to the change in our understanding of the surrounding universe and all that that lies within it? Well, let's think about that, then. In fact, let's put it this way...

"Saturn is no longer a gas giant, it's a [something else]. Here's an explanation of why, which is presented in such a way that it can only be argued by fools and dreamers or those with an agenda, whether personal or not."

How many people do you think would give a single fuck at all if that were to happen? That's right. Perhaps a small handful that would go immediately unnoticed. So why is Pluto somehow different?

1. Pluto is "small". People don't even understand just how small it is, but they know that it's at least small. That's all that matters, really. Many human beings have this weird thing that happens to them, which I like to call the "underdog effect", or, "big brother syndrome". There are many people in this world who feel the need to look out for each other, or in this case, look out for Pluto, because it's "just such a small planet, it can't defend itself". Yeah, it's ridiculous, but there you have it. That's one reason behind people who are wrongly defensive about Pluto's change from a "normal" planet into a "dwarf planet". Pluto is the underdog, and people like underdogs.

2. Pluto is also a cartoon dog created by Disney, which many people like. This is by far the largest reason, in my opinion. Often the simplest answers are the most accurate ones. People like Pluto the lovable Disney Pooch and Pluto the underdog planet happens to share it's name with him. Though, technically Pluto the lovable pooch actually shares his name with Pluto, the tiny speck in the night sky. (figure of speech, it's not even big enough or close enough to be a speck in the night sky)

That's pretty much it. Yeah, people get up in arms about Pluto because they feel the need to defend something that's small in comparison to nearly anything else in the known solar system, but is enormously huge in comparison to themselves. And because it shares a name with a cartoon dog. Anyone who doesn't fall into either of those two categories, falls into a category which I simply wished didn't exist and refuse to believe that it does in hopes that it will someday disappear, if only for the sake of my sanity.

Edit: I seemed to have posted this into a reply. Whoops. Oh well. There it is. Also, I understand the joke, it didn't go over my head. I only wished to address this issue as I've encountered it recently and this joke is loosely based on that. Thanks.

Edit: TL;DR - People like underdogs and people like cartoon dogs, ergo, people like Pluto.