I thought, why should we make life on Mars when we can easily build a large spaceship (like an American aircraft carrier) for human habitation.
Mars is just an arid planet with little chance for humans to survive. sorry not a scientist

8 billion people need how many aircraft carriers? and energy source? And still, they need to face issues with climate conditions.
Just the first step towards Mars but it is not a place for human to survive which is going to be the big task need to be tackled.