Pretty sure this means radical and revolutionary in the political sense. Though most scientists and astronauts weren't billionaires - they were government employees.
And honestly, yeah, revolutions like the American one where a bunch of rich people used propaganda, money, and threats to secede so they and an oligarchic "democracy" of white male land owners could pay lower taxes and privatize public land weren't as radical or revolutionary as subsequent propaganda made them out to be.
I mean it depends, doesn't it? If landed gentry overthrew a monarch concerned with the welfare of peasantry so they could maintain exploitation it's not at all radical or revolutionary in the way the meme means it.
Yep. The race to the Moon was just a dick measuring contest between the US and USSR. Manned space travel is a meaningless ego trip for governments. Unmanned space travel is equally useless in practical terms - learning about other planets does nothing to help the proletariat on our own - but at least wastes less money.
Global internet connection via satellite, and GPS, on the other hand, have helped the proletariat in actual practical terms. It's a shame it took all that billionaire ego dick waving to get there.
I think honestly this is a valid critique even as a fan of space exploration and a "luxury space communism" wisher.
I think visiting other planets has given us some scientific knowledge that is valuable in and of itself in a quest for self-improvement and exploration - seeking of answers to our questions and new questions. I would hope, that this one day can become a worthwhile pursuit for the collective humanity as a voluntary quest, but obviously it's a misallocation of resources when there are capitalists to be eaten first and it's only done as a way to one up the rival empire.