That's really the point. The search for that rare/legendary that has almost perfect stats for you. If all legendary's were exactly the same, it would just be a case of picking one & goldfarming, since the market's already flooded.
If I knew how bad this is I wouldnt spend my cash on blacksmithing, it's just totally pointless. I've got to lvl10 and the other day I tried to craft some lvl60 pants, made 4 pairs the whole thing costed me around 350k+ and the options I got were so damn bad that the best I could do is sell it to merchant for 3k, nobody would even buy it for 5k from AH it was that bad.
I guess what they could do is put an extra option where you can choose at least 1 out of the 4 or 5/6 stats for lvl60 rares. Say u can craft lvl60 armor and u would be able to choose at least 1 of the options, say str, vita or all res. Ofcourse the amount could still be random along with the other options but this way at least you wont craft totally useless stuff like I had ie one of the pants had on them - low fire resist, extra hp on healthglobes, small hp regen and 6% gold find. This costed me 80k or so to make, really blizzard? I wouldnt wear this if this even if it was lvl15 item with same stats.