Comment Re:But where are the potentional profits? (Score 1) 116
Water is one of a large class of substances that we would like to find in space for local use, rather than to send back. Any mining materials return operation will want to minimize human presence, but for maintainability that presence cannot be zero. Hence the need for life-maintaining consumables.
I think you have missed the point of my second paragraph, "If you want to justify space exploration on economics, then you must accept that economics will set the schedule." In economic arguments, you cannot simply treat imagined future needs as if they were actual current needs.
A lot of space boosterism displays confusion over the proper use of the present and future tenses.