This is a smart move by Nintendo. Most of the people complaining about the 2DS either already have a 3DS or aren't parents, AKA not the target audience. For those who don't have a 3DS, this is the chance to get a cheap ass one if you don't really care about the 3D. For parents, you have a cheaper, more durable 3DS to give to your kids with no hinges to break and no gimmicky 3D effect that just piles onto the price. It's a win for everybody.
Another big factor to remember is that Pokemon X and Y are coming out in less than a month, and as we all know, new Pokemon games ALWAYS sell like ****ing hotcakes. Thousands of Pokemon fans who did not own 3DS before (including myself) went out and bought the thing just so they can play this game. It's already the fastest-selling 3DS game just going off of pre-orders alone. Main series games can sell upwards of 3 million copies in just 2 days. And what better way to accommodate those hungry customers by offering a more affordable option for the 3DS the exact same day those games come out? Scratch what I said before, it's not just smart. It's genius.