[quote=@PPQ Purple]
If you play an MMO in order to sit alone and play a game without or with minimal interaction with other players than you are the strange one.

I spent more than a decade of my life playing MMO games. And I played more than 10 of them during that time and different periods.

Basically a good MMO is fundamentally not a game you are supposed to have fun with but something that's meant to facilitate social interaction. 
[/quote]

To be clear on a few things.

1. There's plenty of people that play MMO's for a single player experience. Especially, as time rolled on and the games exploded into popularity. So, if you played enough of them. You'd know that many of them designed themselves to make that more than possible. From niche ones, to the more popular and mainstream ones.

But if I needed to see evidence for why you believe MMO's aren't designed to be too engaging. (Like they're bad free to play mobile games or something.)
 
2. "10 years of playing + I played 11 (more than 10) MMO's. (Means you played a single MMO on average in a whole year.) Which is certainly not the appeal to authority counter that you may think it is. Since it's the equivalent to saying, "I know I don't like any Asian Cuisine, I've had take-out at least twice this year."

But let's be clear, one game a year isn't even close to scratching the surface, in any genre. (Though admittedly, that also depends significantly on the window of time. Since according to sites that track this stuff, around 250 MMO's were released in 2016 alone. Which probably isn't even the highest year either...)

However, from how you've described it, I would assume that you've simply played the wrong MMO's. And had the wrong reasons to play on top of it. (As if you were socially pressured into playing them with others. But then consider, how fun it is to do anything under those circumstances. Though my guess stems from how dismissive you've sounded to Diablo and other RPG's too.)

So if that isn't the case, I'll stand corrected. Though playing a few (and yes, ten is most definitely VERY few.) The argument should boil down to your taste, versus some general statement on the "mmo genre" itself.

3. Because, here's the secret, MMO's are (or I'd at least argue were) incredibly diverse games. So putting it in a box, is already likely doomed to inaccuracy. Since there were too numerous to count back in their more popular days, and basically included every single genre. Sports, JRPGS, Western RPGS, Slice Of Life, Sandbox, Simulation, RTS, Shooters, Mystery, name a genre or theme, it existed. And even within ones of similar genres, didn't remotely play like each other.

Something that likely couldn't be said as easily for other genres that garnered popular and attention. But, really, if you name some of your favorite games out there, someone else could very likely boil them down to a simple gameplay loop. Though like the best open world games, an enjoyable variety of content, is what the best MMO's provide.

So, I'd be curious to know what games you do primarily enjoy. (Then I could very likely point you to its MMO counterpart that exists/existed.)