So you think the entirety of Reddit is using random usernames, with disposal email and a random generated password via Firefox? Really? Is this what you say on every data breach that involves user data? Even if that was true, an account getting hacked would be bad. Even old accounts that are no longer used by their owner could be used to spread shit and no one knows who is hacked and not. This is valuable. But that's besides the point. According the article the passwords and accounts are safe.
Users have private discussions or any other stuff, including their real email address and who knows what else. This is bad. This is really bad for the end user. The hackers try to make money, just like any other data breach. Only CEOs would try to talk this good.