I suppose because I consider the two cent piece to be almost exactly twice as stupid as the one cent piece. On this basis I half expect Congress to do it.
I'm sure collectors would like reissues of the 1/2 cent, (cent), two cent, and three cent and twenty pieces to coincide with "special" occasions. Since I like sorting through change, specifically Lincoln cents, I'd be sad at the day the Mint/Gov. decides not to mint them anymore. There's too much history and culture in it.