They only look like random rocky deserts. Gale was carefully selected as a site with lots of exposed layer geology. And none of the current rovers could drill

They only look like random rocky deserts. Gale was carefully selected as a site with lots of exposed layer geology. And none of the current rovers could drill a mile into ice, or get there in the first place. First drill will be InSight real soon now. OP, I think, suffers from Earthbound preconceptions of development in a field that has physics laughing back.