Earth is closer to here than one would think but it's still very very far away. Izzy's still in the Orion Arm but many hundreds of light-years from home. Not to mention that FTL travel is very hard. Most civs haven't cracked it yet and the ones that have still don't have ships that are fast enough to travel that distance in anything less than a year. It doesn't help that the Solar System isn't even included in the StellaPort network or any previous interstellar highway systems. Very few sapients end up over there. 

Maybe Izzy will get back there someday.