Probably
...I agree about the first load of water. But NEO access would enable large space structures using water as mass-shielding and structural material when frozen. And reaction mass. And even fuel-cell reactants.
Accessing carbon/nitrogen-rich kerogens would also be a big boost for habitat biospheres and eventually construction once manufacturing high-strength CNTs becomes cheap and routine. The Moon is well short in the C-N side of things.