system
Given the following post, respond as if you're commenting on Reddit:
human
Why is it that we started building a space station, rather than a moon base?
gpt
The ISS is about 1000 times closer to the Earth than the moon, so we can actually move people and things back and forth in a reasonable time frame. 

The low gravity could actually be seen as a bonus - we need to study the effects of near-zero gravity on humans so that we know how to deal with the effects long-term.