>If a client does not know, how can they be in a position to not care? Often, after I have been more informed of a sitation, my point of view will change.

You can't know everything. At some point, you don't care enough to take the time to know about something.

I think Erik's point is good: the client is paying for a solution. He may not know all the details of how that solution is implemented. But a legitimate reason for that lack of knowledge is that he doesn't care.