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One very simple reason - Origin exclusive.
Simple, they tried to force people to use Origin who don't want to install additional software, I will not be forced into using a piece of software I don't want installed on my PC, ergo no BF3.
I was super hyped for that game until I found out about Origin, and then I didn't bother buying it, I even got a free copy with my i7 2600k CPU and never installed.
No Origin, this is non-negotiable.
I don't understand people like you. Silly reasons.