1. Because astronauts have to prove their the best of the best. The average astronaut is that kid Jimmy your mum keeps comparing you too
2. Their white as that reflects the most light/radiation thus reducing the chances of cancer when they get back
3. Because mankind was what people used to refer to all of the human race back then.
4. No trans people where on the Lunar module and even if there was, they would need to save space/reduce weight.
5. Pure rage and anger is sustaining him
