Just like how we shouldn't worry about big kids Sony and their 70+ million network being compromised?
Telling people not to worry about security works until they, inevitably, have their data compromised. Technically aware consumers have a responsibility to put pressure on companies to be secure with information.
Precisely the same way, yes. Sony's network being compromised had absolutely nothing to do with password case sensitivity, and absolutely everything to do with shoddy practices elsewhere that opened a massive hole into their database, allowing them to download millions of accounts worth of data.
Millions of accounts from a single breach somewhere. Not millions of accounts individually brute forced because their case-insensitive passwords made them trivially guessable.
We should be worried that Blizzard will get hacked like PSN was. That would be potentially catastrophic. But case sensitivity has almost no effect on password security unless your users ALL use random passwords.
Telling people not to worry about security works until they, inevitably, have their data compromised. Technically aware consumers have a responsibility to put pressure on companies to be secure with information.