Who Gets To Be Lazy? Users or Designers?

In response to my post, To Dash or Not To Dash, Dave Boggs commented:

There are times when its appropriate ask the user for the information again, even though the ‘site’ or ‘system’ may have it. An example would be in cases of database/information maintenance. When done correctly, asking a user to put in information the ‘system’ or ‘site’ has already is a great way to maintain and update user records.

I have to heartily disagree. In the best scenario, you get exactly the same information back that you already had.

In any other scenario, you get different information. But, different ≠ updated. If the new information contains a typo, you could be replacing good information with bad.

There has to be better ways to update information than repeatedly asking users to type the same information.