Progressive are afraid that longer life-spans or near immortality would damage the environment or exacerbate societal inequality. But the consequences of extended life-spans may actually lead to more progressive policies on those issue.
Scientific knowledge is like any other area of specialized knowledge: the average person is rationally ignorant and will use ideology and rules-of-thumb, rather than the expert knowledge that they do not possess, to guide their behavior.
We have reached a tipping point in popular culture: novelty is still the best way to gain attention and prominence, but novelty is now defined by challenging the last decades’s worth of exuberant claims made by journalists, Internet gurus, and others.
Progressives know that the American public will not support direct subsidies to individual workers harmed by immigration, so they use restrictions as a cynical half-measure to prevent the supposed harm from happening at all.