The Steam love is one of pure emotional attachment. Logically, if Origin offers the same service as Steam, gamers shouldn't have an issue. But - and let us not mince words here - Steam saved PC gaming. It wasn't dead, but it sure as hell was a wasteland of shitty ports, exceptionally delayed games and broken customer service. Steam, and it's adoption by so many gamers quickly, revitalized the industry. It's still not perfect, but it's a hell of a lot better than it used to be.
So, as a PC gamer, anything that looks like it's threatening Steam's access to all of the big name games makes me nervous. Where the hell was EA during the dark days of PC gaming and the early days of Steam? Oh, right. Buying up and shuttering fantastic PC developers and shunting the workers to console development.
It's an emotional response because EA has consistently done everything it could to marginalize PC gaming, outright destroying promising young development houses, ruining great PC-first game companies and generally spending their time being as anti-consumer as possible - if you were a PC consumer.
Valve was the opposite. They brought the supremely fragmented PC market together under one banner, with fairly benign regulation and easy patch distribution. Even with millions of users, consumer complaints against the service are relatively rare, and usually shown to taken care of. They worked with smaller developers to get exposure for their games, bringing excellent gems like Recettar and Terraria to a wider audience. Their customer-friendly sales are the stuff of legend.
So yeah, it's an emotional response.
Could EA's service become somewhat like Steam? Possibly. But the fact that they won't allow Steam to carry their games now means they're less interested in the customer and in competing via superior customer satisfaction. They clearly have no faith in the service, which means they're out of the gate not trying as hard to support the platform as they could. It's worrisome, to me.