Teleportation is something that exists here but isn't a universal thing. Much like FTL travel, not every civilization can figure it out, or has interest in it at all even. Not only that, everyone who has figured it out does it differently. There's also not a support network to aid teleportation over extremely long distances. There's not even any that could escape the gravity of a planet.  Meanwhile there are support networks for FTL, such as the StellaPort network. However none of those go close to Earth. 

Slip discing could be revolutionary. Though yeah, super dangerous.