Geez. I explained (and not only me) it to you about two times already.
So once more, very simplifiied. Junkers deal with information and goods. They can get where other unlawfulls can't. And they profit from it. If they pirate around, authorities wil eventually say "Ok, that's it, we had enough"(And heck, they would like that) and ban Junkers from House space (That's why you can pirate outside House space, noone will ban you out, noone can), ruining the busyness, big time. Junkers won't really provoke people or attack anyone, since they want to keep "neutrality". Junkers profit from the fact they are on the edge of lawfull and unlawfull world, why the heck would they want to ruin lucrative busyness which can last for ages, just to "2m or die"? Not logical. At. All.
And FR5? If you go out as full-time-pirate, it's in best interest of ALL Junkers to get rid of you as fast as possible. Noone wants crazy individual to ruin the standing of whole "nation" you see.
It's no aggressive faction, out for blood, rum and money, harr, harr, yohohoo! More like shady merchants, spies and even regular workers. They fight just to defend themself and their interests.
If you don't see my point, try to make Zoner and... well, for example attack every unlawfull person you'll have the chance to meet. And then ask rest of the Zoners "Why not". It's kind of similar situation.
What about Real-life situation? You have a job you like, you make 5'000 bucks each month and guarantee you'll be working there for many years. Here comes uncle Chance. You may get one-time 25'000 bucks, however, it means you will loose the work, your name will be stained for a lifetime, company will have a lot of problems and police will be looking for you. ... So will you take the 25'000? Most likely not. Unless you have uncurable disease or lost it in the head.
I buy things I don't want to make an impression on people I don't like.