I don’t know if I quite agree with that being a morale issue. But that same logic nuclear reactors are immoral because if they blow up they can cause a lot of harm.

I do agree that it is a little sketchy for human flight, but they wouldn’t use it if there was a significant chance of it harming the people on board.

Going to the moon was a fantasy at one point. I just don’t see any downsides to trying to become multi-planetary. Even if it fails there would still be technology developed in pursuit of that goal that helps life on earth.

That wouldn’t happen for an extremely long time. It will be many generations before Mars would be self sufficient enough that they could wage war on Earth. I don’t feel like that’s enough of a possibility to not even try colonizing another planet.

I’m not aware of any reason on why we’d want to colonize the bottom of the ocean, but there’s many reasons to want to become a multi-planetary species. Space exploration has also lead to many technologies being used in everyday life today.

What’s morally questionable about fission fragment drives?