It’s justifiable. The first thing to keep in mind is that BattleTech is the future of the ‘80s. The Internet wasn’t a thing back then. We didn’t have instant access to information from Zimbabwe or Siam. No look-down satellite views or Google maps. As a result, the design of the BT universe isn’t built on Information Age assumptions. There is no multi-planet information systems, and, in fact, maybe a half-dozen planets in the Inner Sphere would have an Internet the equivalent of ours.
What this means: it is easier for state-controlled media/propaganda organs like The Voice of the Dragon to basically be Soviet-era Pravda … or what current Russian media is doing about their coverage of the ‘special military action’ against Ukraine. When there are no dissenting voices the average person can hear, the average person has no reason to believe that there are any dissenting voices at all.
So if your culture has been deliberately shaped by the Order of the Five Pillars for literal centuries to believe enduring hardships is not only moral and upright, but a duty-bound requirement for the defeat of those dastardly reprobates that are to blame for your suffering in the first place for their failure to kneel before the Dragon’s rightful claim to being First Lord of the Star League. The same people who committed atrocities against The Dragon in the past …
Yeah, you can build a culture that will accept some pretty severe restrictions in liberties and living conditions. Especially when the occasional ‘unproductives’ that try to change things end up deader than dirt thanks to the ISF.