You don't need fusion power to melt ice, to move regolith over habitats for shielding, or to melt rocks to extract and process metals. I have absolutely no idea

You don't need fusion power to melt ice, to move regolith over habitats for shielding, or to melt rocks to extract and process metals. I have absolutely no idea where you get the notion that it meeds fusion power? Solar power or things like kilopower reactors are a great option for Mars, especially for bootstrapping.