Because that's how the game is designed. In boom state HGEs, you get proto heat radiators, proto light alloys and depending on whose space, Cdcs or imp shielding.
In a war or civil war HGE you get MGAs and MSCs. In a civil unrest state you get Improvised components and in an outbreak state you get Pharmaceutical isolators. None of this is in dispute, I hope, it's just that you used to be able to find HGEs in more systems in a certain state to find what you want in the past, now it's become an rng mess.
The BGS is still bedding in after the states all got reset to none on update day, so changing states will take time. Give it a few weeks and there will probably be more variety. Just as the claims it was jammed died away as people realized there's a period of hidden (not static) influence after conflicts completed. I'm not convinced its broken, I think its changed and we don't understand how (yet).
That old method may no longer work, mine is working fine though.