Here is a list of reasons to abandon human spaceflight:
It is expensive
The NASA programme to return humans to the Moon (Artemis) is expected to cost $93billion by 2025. It might have landed the first astronauts back on the Moon by 2027.
It is dangerous
Around 4% of launches result in failure, you can survive no more than a minute or two in a vacuum, radiation levels are vastly higher outside of Earth's magnetic field, lunar dust appears to be a human irritant, Martian dust is almost certainly toxic, and drinkable water takes an awful lot of work.
It offers little benefit to humanity
Human space exploration often focusses on resource exploitation, exploration and just a little science. Being generous, this might help towards 3 of the 17 United Nations Sustainable Development Goals.
It strips people of their humanity
See here.
It diverts attention from our home
53% of Americans support a human mission to Mars. 37% of Americans see addressing climate change as the top priority for their country.
It damages our home
Carbon dioxide emissions for the launch alone are estimated to be 50-100 times more per space tourist than a long haul plane flight.
It damages space
See here.
It will divide us further
Barely 40 countries have seen at least one of their citizens travel into space. Of the 70+ countries with space agencies, only 16 have the ability complete a space launch, only 7 to launch a rocket beyond Earth orbit, and only 3 can launch people into space. Three of the most advanced commercial spaceflight companies were founded and initially funded by just 3 people.
It lacks ambition
Voyager 1 is the furthest human-made object in space. Having launched in 1977, it has currently travelled 0.000000000005523% of the distance to the edge of the observable Universe.
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