Because it is not a very good value at all. You could save $50-60 and get the Xeon e3-1230v3 instead or even the almost identical e3-1245v3 for $25-30 cheaper.
Yes it is very good at everything but I don't recommend buying it for anything
why
I can tell you one reason, the price is almost the same as the K version, and the K is faster. So rather go for the K unless the price difference is pretty big (eg. you found the i7 4770 on sale somewhere).
Because it is not a very good value at all. You could save $50-60 and get the Xeon e3-1230v3 instead or even the almost identical e3-1245v3 for $25-30 cheaper.