I heard a speech given by an Astronaut. He new to the penny(at that time) per pound how much it cost to launch something into space. He then started listing all the necessities humans would need for a journey to mars and gave the figures for how much all of it would weigh. The cost was staggering. That’s the first reason human life will never reach Mars. The second is gravity. The effects of prolonged existence in the absence of gravity are already well known. If we could afford to get them there and they were able to safely land, they wouldn’t be able to move a muscle. Even though the gravity of Mars is less than ours, they would be rendered immobile. It’s folly!
Can you explain how you came up with this meandering musing? Mars has less gravity than Earth. Astronauts in the space station are not immobilized with no gravity at all. How can you imagine individuals landing on Mars would be rendered immobile? Coming back to Earth would be a problem readapting to our gravity after a six month stay on Mars, but less than than that of some Astronauts that spent over a year in space.
I suspect you never read any Science Fiction.