Imagine a world where people are required to get vaccinated, required to wear masks and take precautions if there's an outbreak, and are given universal healthcare and a basic universal income. Now imagine that these rules are enforced by law. If people refuse, they are required to be placed in quarantine areas away from the general population due to the risk they pose to the population. Now imagine "pure lifers" coming in. Knowing full well the polity they were trying to move to, wanting to go there due to the fact the population was so healthy and their planets kept clean, had these laws.
Can you imagine the fit they throw when they find they are not being allowed to be exempted from those laws no matter how hard they try to avoid it? -- Own Good
Once upon a time, basic health and safety measures were politicised. Interestingly, those on the side of profit above all were counter to the health measures that would maximise labor exploitation. They favoured speaking out against even the simplest of measures that could protect the workers, because the allied "health care" system could wring more money out of the populace via over-inflated billing regimens.
This lead to widespread poverty, disease, and business losses, but by then it was an identity, and all they could do was double down on it. When the chance arose to make a world in their own image, the faithful Pure Life movement threw themselves at the stars, aiming to live an all-natural, all-pure life. It was the One True Way, to which the universe's population would naturally move towards.
You can imagine their outrage when they found that the rest of the world had carried on in the opposite direction. It had such pros as being able to afford medicine, shelter, and food. It had such plus sides as an almost nonexistent infant mortality rate. There were even bonuses like a longer and more enjoyable lifespan, which was heresy to the Pure Life Cult. Obviously the solution was to spread their wisdom to every corner in the Alliance.