Is SERE CBT training necessary if you are not deploying or going TDY overseas?

I have nothing against the SERE CBT training, I am just wondering everyone's opinion on this. If you are stationed CONUS, and you are not going TDY or deploying do you think it is necessary or a waste of 4 hours to go through this CBT? Should this just be required if you get orders or should it stay as is?