Why is it ok for us to live no mars lol

Because Mars is in the circumstellar habitabe zone (CHZ)

Explanation:

The habitable zone also known as the circumstellar habitable zone (CHZ) in astronomy is a star's range of orbit that water can exist in liquid form provided there is sufficient atmospheric pressure based on comparison to the Earth like condition of solar radiation and distance from the Sun. The CHZ nature is important in specifying planets that are able to have water in liquid form and therefore are able to form a biosphere similar to the Earth's biosphere

The planet Mars is in the CHZ outer edges such that the conditions for the formation of water only exists in the lowest elevations of the surface of the planet Mars which is less than one third of Mars's entire surface area where, the water, if present, will be rather volatile.