The main reason we haven't gone to Mars is that it is a complex and expensive endeavor. It requires advanced technology, significant funding, and careful planning to ensure the safety and success of human missions to Mars. There are various challenges to overcome, such as developing the necessary propulsion systems, spacecraft, life support systems, and landing technologies that can safely transport humans to Mars and sustain them during the mission. Additionally, the long duration of space travel, potential health risks to astronauts, and the harsh conditions on Mars pose significant obstacles that need to be addressed before a manned mission can take place.
