> I suspect the truth is that politicians mostly just don't care that much about science because they aren't smart enough to understand its value, or decent enough to care.
Most politicians understand that humanity is never going to leave earth and so all of this stuff is basically pointless to the actual business of governing. So we will miss out on the next MRI or microwave because we missed some new technology... so what? How does that make their lives, personally, worse in any practical way?
Humanity is going to melt down in the pretty near future here... if the Russia stuff doesn't escalate, and the US doesn't slide into fascism, there will be yet another wave of conflicts tomorrow due to extremity from climate change or something else. Water is going to become extremely scarce, habitable lands are going to become uninhabitable and undesirable tundra is going to become extremely desirable, and countries will fight for ownership of the reshuffled deck.
Humanity has passed the peak of this enlightenment cycle and is heading for a new dark age, maybe the Forever Dark Age given the depletion of most of the accessible reserves of energy and critical materials. The best-case scenario is that we wind down to some steady-state existence with some level of mechanization/etc, but the exponential growth thing mathematically cannot continue indefinitely. The Earth does have physical limits and just because Malthus was wrong about it in 1700 doesn't mean you can grow an exponential rate in a finite system forever.
Who cares about space? We're not going there. And their job is making themselves comfy and keeping things going mostly straight in the meantime. Science really doesn't matter in that context as long as someone else isn't drastically ahead of you such that it produces a military advantage, they don't care about the absolute advancement, only the relative to everyone else.
I'm not saying this is a good thing, I'm saying this is how it is.