Well, this is the stuff of science fiction. Still, there's an awful lot of ice in the solar system, perhaps even on moons orbiting gas giants. I mean, it's fun to think "what if?" I merely pointed out that, in a hypothetical scenario which brought a small comet's worth of ice down the gravity well of the Sun to the Earth (and its gravity well), getting said ice to the surface would have the same impact of... a comet. Hitting the Earth. Fast.
However, what I believe is happening here is a case of the (un)intended side effects of programming people to put trust in corporate media, and the news media is almost as bad as Hollywood when it comes to reporting on actual science. The "Do the Math" guy said that his survey of adult students showed only 11% of them knew that no human has been beyond low Earth orbit (600 km) since 1980 (the last moon landing occurred in December, 1972).
Science and technology have been great at miniaturization as far as computational devices (cell phones), but that does not mean that all areas have advanced at the same pace. The laws of physics still apply.
Why don't we just let Boeing build space ships too? I'm sure all the diversity graduates have wonderful ideas for making space a .... safe space.