And why do RL shipping companies don't hunt pirates in the Gulf of Aden? And still passengers travel there and with these very shipping companys.
Shooting bad guys isn't the responsibility of shipping companies, its the responsibility of the Police and military.
Liners are the best defended transportation a passenger in Sirius can pay for and in RP Liners are very capable of repelling attacks and reaching the next port with all passengers alive. OSCs also has its own escort wing to secure their ships, and all OSC NPC Armored Transports never travel without fighter escort. They also pay mercs/freelancers to shoot bad guys (they give out missions at their bases) but why would they risk assets and employees in a witch hunt if they can just point the military into the right direction...?