This is the kind of thinking that could ruin gaming if adopted by more people- which, thankfully, it probably won't. Just because games started with multiplayer in mind doesn't mean they were MEANT to always be multiplayer experiences.That's like saying colored movies are a gimmick because they started out in black and white. With changes in technology and time comes changes in the medium itself.
Yes, in the days of the arcade it was clearly more of a social thing, since you actually had to leave the house to play them and almost always had multiplayer, but that was before the home console market rose to great prominence. By that point, anyone could play games at any time, it didn't matter if you had friends over. Thus why single-player experiences became the focus, at least until online gaming came along. But just because we have that doesn't mean we should just write off the last 20-30 years and say "OKAY WE'RE DONE WITH THIS SHIT!"
If the day ever comes where I can't play something like Skyrim or Metroid Prime without some douchenugget sweeping in to verbally assault me and ruin the atmosphere, I'm putting away my controllers for good.