Exactly. I play it on the xbox360, so I really don't care.
But I won't miss the opportunity to make an argument.
I know there is this big anti-Origin circle-jerk campaign (usually in favor of steam), which I still don't understand, because steam does the exact same things, but seriously, Origin is not that bad. You're either locked into one Publisher/Vendor or a different Publisher/Vendor. They both spy on you. Valve lures you into impulse purchases for quick cash via promotions that really don't get you much aside from coupons for more impulse purchases. Origin needs some UI work.
ME3 is on Origin because of Valve's success. What it isn't on Origin for is the reasons that Dragon Age 2 got kicked off Steam. Steam is one of the only ways that DRM works to prevent initial release piracy, and works (reasonably) well. Lots of developers use Steamworks DRM, and they are happy with it. EA wants in on that kind of protection, but due to selling their DLC within their own games (which works nice, at least Bioware's games anyway), they're certainly not going to use Steamworks.
That's why ME3 requires Origin.